21126270054 has 16 divisors (see below), whose sum is σ = 42662760192. Its totient is φ = 6973720008.

The previous prime is 21126270043. The next prime is 21126270131. The reversal of 21126270054 is 45007262112.

It is a congruent 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, 17091834 + ... + 17093069.

It is an arithmetic number, because the mean of its divisors is an integer number (2666422512).

Almost surely, 2^21126270054 is an apocalyptic number.

21126270054 is an abundant number, since it is smaller than the sum of its proper divisors (21536490138).

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

21126270054 is a wasteful number, since it uses less digits than its factorization.

21126270054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34185011.

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 21126270054 in words is "twenty-one billion, one hundred twenty-six million, two hundred seventy thousand, fifty-four".