21522139210 has 32 divisors (see below), whose sum is σ = 45512554752. Its totient is φ = 7224214080.

The previous prime is 21522139193. The next prime is 21522139229. The reversal of 21522139210 is 1293122512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7523794 + ... + 7526653.

It is an arithmetic number, because the mean of its divisors is an integer number (1422267336).

Almost surely, 2^21522139210 is an apocalyptic number.

21522139210 is an abundant number, since it is smaller than the sum of its proper divisors (23990415542).

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

21522139210 is a wasteful number, since it uses less digits than its factorization.

21522139210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15050478.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 21522139210 in words is "twenty-one billion, five hundred twenty-two million, one hundred thirty-nine thousand, two hundred ten".