21051566058 has 32 divisors (see below), whose sum is σ = 42656072256. Its totient is φ = 6925213568.

The previous prime is 21051566057. The next prime is 21051566113. The reversal of 21051566058 is 85066515012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21051566051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452416 + ... + 496772.

It is an arithmetic number, because the mean of its divisors is an integer number (1333002258).

Almost surely, 2^21051566058 is an apocalyptic number.

21051566058 is an abundant number, since it is smaller than the sum of its proper divisors (21604506198).

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

21051566058 is a wasteful number, since it uses less digits than its factorization.

21051566058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45398.

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 21051566058 in words is "twenty-one billion, fifty-one million, five hundred sixty-six thousand, fifty-eight".