18942626521 has 32 divisors (see below), whose sum is σ = 24274446336. Its totient is φ = 14382144000.

The previous prime is 18942626509. The next prime is 18942626531. The reversal of 18942626521 is 12562624981.

It is not a de Polignac number, because 18942626521 - 2⁹ = 18942626009 is a prime.

It is a super-4 number, since 4×18942626521⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18942626531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185976 + ... + 269206.

It is an arithmetic number, because the mean of its divisors is an integer number (758576448).

Almost surely, 2^18942626521 is an apocalyptic number.

It is an amenable number.

18942626521 is a deficient number, since it is larger than the sum of its proper divisors (5331819815).

18942626521 is a wasteful number, since it uses less digits than its factorization.

18942626521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83353.

The product of its digits is 414720, while the sum is 46.

The spelling of 18942626521 in words is "eighteen billion, nine hundred forty-two million, six hundred twenty-six thousand, five hundred twenty-one".