21025535230 has 64 divisors (see below), whose sum is σ = 46241694720. Its totient is φ = 6718800384.

The previous prime is 21025535161. The next prime is 21025535249. The reversal of 21025535230 is 3253552012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36801 + ... + 208339.

It is an arithmetic number, because the mean of its divisors is an integer number (722526480).

Almost surely, 2^21025535230 is an apocalyptic number.

21025535230 is an abundant number, since it is smaller than the sum of its proper divisors (25216159490).

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

21025535230 is a wasteful number, since it uses less digits than its factorization.

21025535230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171673.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 21025535230 in words is "twenty-one billion, twenty-five million, five hundred thirty-five thousand, two hundred thirty".