20918057426 has 16 divisors (see below), whose sum is σ = 37016286720. Its totient is φ = 8675691840.

The previous prime is 20918057401. The next prime is 20918057431. The reversal of 20918057426 is 62475081902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24098711 + ... + 24099578.

It is an arithmetic number, because the mean of its divisors is an integer number (2313517920).

Almost surely, 2^20918057426 is an apocalyptic number.

20918057426 is a deficient number, since it is larger than the sum of its proper divisors (16098229294).

20918057426 is a wasteful number, since it uses less digits than its factorization.

20918057426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48198329.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 20918057426 in words is "twenty billion, nine hundred eighteen million, fifty-seven thousand, four hundred twenty-six".