21099079610 has 64 divisors (see below), whose sum is σ = 47025868032. Its totient is φ = 6650090496.

The previous prime is 21099079609. The next prime is 21099079637. The reversal of 21099079610 is 1697099012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154997 + ... + 257336.

It is an arithmetic number, because the mean of its divisors is an integer number (734779188).

Almost surely, 2^21099079610 is an apocalyptic number.

21099079610 is an abundant number, since it is smaller than the sum of its proper divisors (25926788422).

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

21099079610 is a wasteful number, since it uses less digits than its factorization.

21099079610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412407.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 21099079610 in words is "twenty-one billion, ninety-nine million, seventy-nine thousand, six hundred ten".