21007210600 has 48 divisors (see below), whose sum is σ = 49165290720. Its totient is φ = 8347224000.

The previous prime is 21007210541. The next prime is 21007210633. The reversal of 21007210600 is 601270012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317602 + ... + 378001.

It is an arithmetic number, because the mean of its divisors is an integer number (1024276890).

Almost surely, 2^21007210600 is an apocalyptic number.

21007210600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21007210600 is an abundant number, since it is smaller than the sum of its proper divisors (28158080120).

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

21007210600 is a wasteful number, since it uses less digits than its factorization.

21007210600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695770 (or 695761 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 21007210600 its reverse (601270012), we get a palindrome (21608480612).

The spelling of 21007210600 in words is "twenty-one billion, seven million, two hundred ten thousand, six hundred".