21006713572700 has 72 divisors (see below), whose sum is σ = 47056497774720. Its totient is φ = 8131378867200.

The previous prime is 21006713572693. The next prime is 21006713572729. The reversal of 21006713572700 is 727531760012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123198704 + ... + 123369096.

Almost surely, 2^{21006713572700} is an apocalyptic number.

21006713572700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21006713572700 is an abundant number, since it is smaller than the sum of its proper divisors (26049784202020).

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

21006713572700 is a wasteful number, since it uses less digits than its factorization.

21006713572700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210207 (or 210200 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 21006713572700 in words is "twenty-one trillion, six billion, seven hundred thirteen million, five hundred seventy-two thousand, seven hundred".