21513024610 has 64 divisors (see below), whose sum is σ = 48354776064. Its totient is φ = 6694776000.

The previous prime is 21513024601. The next prime is 21513024613. The reversal of 21513024610 is 1642031512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21513024613) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 473385 + ... + 516835.

It is an arithmetic number, because the mean of its divisors is an integer number (755543376).

Almost surely, 2^21513024610 is an apocalyptic number.

21513024610 is an abundant number, since it is smaller than the sum of its proper divisors (26841751454).

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

21513024610 is a wasteful number, since it uses less digits than its factorization.

21513024610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44119.

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 21513024610 in words is "twenty-one billion, five hundred thirteen million, twenty-four thousand, six hundred ten".