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20706891564 = 223311132631873
BaseRepresentation
bin10011010010001110…
…100001011100101100
31222110002200002011210
4103102032201130230
5314401431012224
613302420314420
71332064450152
oct232216413454
958402602153
1020706891564
118866556127
12401a842a10
131c4cc8aa78
1410061353d2
15812d50429
hex4d23a172c

20706891564 has 96 divisors (see below), whose sum is σ = 50534313984. Its totient is φ = 6591836160.

The previous prime is 20706891479. The next prime is 20706891571. The reversal of 20706891564 is 46519860702.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11054532 + ... + 11056404.

It is an arithmetic number, because the mean of its divisors is an integer number (526399104).

Almost surely, 220706891564 is an apocalyptic number.

It is an amenable number.

20706891564 is an abundant number, since it is smaller than the sum of its proper divisors (29827422420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20706891564 is a wasteful number, since it uses less digits than its factorization.

20706891564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 20706891564 in words is "twenty billion, seven hundred six million, eight hundred ninety-one thousand, five hundred sixty-four".

Divisors: 1 2 3 4 6 12 31 62 93 113 124 186 226 263 339 372 452 526 678 789 1052 1356 1578 1873 3156 3503 3746 5619 7006 7492 8153 10509 11238 14012 16306 21018 22476 24459 29719 32612 42036 48918 58063 59438 89157 97836 116126 118876 174189 178314 211649 232252 348378 356628 423298 492599 634947 696756 846596 921289 985198 1269894 1477797 1842578 1970396 2539788 2763867 2955594 3685156 5527734 5911188 6561119 11055468 13122238 15270569 19683357 26244476 30541138 39366714 45811707 55663687 61082276 78733428 91623414 111327374 166991061 183246828 222654748 333982122 667964244 1725574297 3451148594 5176722891 6902297188 10353445782 20706891564