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21700545070164 = 2231808378755847
BaseRepresentation
bin1001110111100100011010…
…10001111100010001010100
32211211112220022000202120120
410323302031101330101110
510321020204014221124
6114053032012431540
74366545510434202
oct473621521742124
984745808022516
1021700545070164
116a07170a61934
1225258647785b0
13c15477921b1c
14550452134072
15279733471d79
hex13bc8d47c454

21700545070164 has 12 divisors (see below), whose sum is σ = 50634605163744. Its totient is φ = 7233515023384.

The previous prime is 21700545070147. The next prime is 21700545070229. The reversal of 21700545070164 is 46107054500712.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904189377912 + ... + 904189377935.

It is an arithmetic number, because the mean of its divisors is an integer number (4219550430312).

Almost surely, 221700545070164 is an apocalyptic number.

It is an amenable number.

21700545070164 is an abundant number, since it is smaller than the sum of its proper divisors (28934060093580).

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

21700545070164 is a wasteful number, since it uses less digits than its factorization.

21700545070164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808378755854 (or 1808378755852 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

Adding to 21700545070164 its reverse (46107054500712), we get a palindrome (67807599570876).

The spelling of 21700545070164 in words is "twenty-one trillion, seven hundred billion, five hundred forty-five million, seventy thousand, one hundred sixty-four".

Divisors: 1 2 3 4 6 12 1808378755847 3616757511694 5425136267541 7233515023388 10850272535082 21700545070164