20957426138704 has 80 divisors (see below), whose sum is σ = 44336815137216. Its totient is φ = 9517410662400.

The previous prime is 20957426138659. The next prime is 20957426138711. The reversal of 20957426138704 is 40783162475902.

20957426138704 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041766854 + ... + 1041786970.

It is a 1-persistent number, because it is pandigital, but 2⋅20957426138704 = 41914852277408 is not.

Almost surely, 2^{20957426138704} is an apocalyptic number.

It is an amenable number.

20957426138704 is an abundant number, since it is smaller than the sum of its proper divisors (23379388998512).

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

20957426138704 is a wasteful number, since it uses less digits than its factorization.

20957426138704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25244 (or 25238 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 20957426138704 in words is "twenty trillion, nine hundred fifty-seven billion, four hundred twenty-six million, one hundred thirty-eight thousand, seven hundred four".