Search a number
-
+
20689330662 = 23372111354679
BaseRepresentation
bin10011010001001011…
…100010000111100110
31222101212121220011000
4103101023202013212
5314332432040122
613300552054130
71331462260200
oct232113420746
958355556130
1020689330662
118857651390
124014994346
131c4944c8c0
141003a83770
158115320ac
hex4d12e21e6

20689330662 has 192 divisors, whose sum is σ = 62833881600. Its totient is φ = 4960388160.

The previous prime is 20689330631. The next prime is 20689330699. The reversal of 20689330662 is 26603398602.

20689330662 is a `hidden beast` number, since 206 + 89 + 3 + 306 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 351039 + ... + 405717.

It is an arithmetic number, because the mean of its divisors is an integer number (327259800).

Almost surely, 220689330662 is an apocalyptic number.

20689330662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20689330662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31416940800).

20689330662 is an abundant number, since it is smaller than the sum of its proper divisors (42144550938).

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

20689330662 is a wasteful number, since it uses less digits than its factorization.

20689330662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54728 (or 54715 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 20689330662 in words is "twenty billion, six hundred eighty-nine million, three hundred thirty thousand, six hundred sixty-two".