21264446210 has 32 divisors (see below), whose sum is σ = 44636745600. Its totient is φ = 7290666096.

The previous prime is 21264446191. The next prime is 21264446233. The reversal of 21264446210 is 1264446212.

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, 3096344 + ... + 3103203.

It is an arithmetic number, because the mean of its divisors is an integer number (1394898300).

Almost surely, 2^21264446210 is an apocalyptic number.

21264446210 is an abundant number, since it is smaller than the sum of its proper divisors (23372299390).

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

21264446210 is an equidigital number, since it uses as much as digits as its factorization.

21264446210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199575 (or 6199561 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 21264446210 in words is "twenty-one billion, two hundred sixty-four million, four hundred forty-six thousand, two hundred ten".