21627530634 has 32 divisors (see below), whose sum is σ = 45539919360. Its totient is φ = 6828505200.

The previous prime is 21627530629. The next prime is 21627530641. The reversal of 21627530634 is 43603572612.

It is a junction number, because it is equal to n+sod(n) for n = 21627530592 and 21627530601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769489 + ... + 797099.

It is an arithmetic number, because the mean of its divisors is an integer number (1423122480).

Almost surely, 2^21627530634 is an apocalyptic number.

21627530634 is an abundant number, since it is smaller than the sum of its proper divisors (23912388726).

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

21627530634 is a wasteful number, since it uses less digits than its factorization.

21627530634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34506.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 21627530634 in words is "twenty-one billion, six hundred twenty-seven million, five hundred thirty thousand, six hundred thirty-four".