21712057630 has 16 divisors (see below), whose sum is σ = 39107595744. Its totient is φ = 8679069280.

The previous prime is 21712057597. The next prime is 21712057651. The reversal of 21712057630 is 3675021712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703357 + ... + 733576.

It is an arithmetic number, because the mean of its divisors is an integer number (2444224734).

Almost surely, 2^21712057630 is an apocalyptic number.

21712057630 is a deficient number, since it is larger than the sum of its proper divisors (17395538114).

21712057630 is a wasteful number, since it uses less digits than its factorization.

21712057630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438451.

The product of its (nonzero) digits is 17640, while the sum is 34.

The spelling of 21712057630 in words is "twenty-one billion, seven hundred twelve million, fifty-seven thousand, six hundred thirty".