21167615530 has 64 divisors (see below), whose sum is σ = 40396382208. Its totient is φ = 7969389120.

The previous prime is 21167615509. The next prime is 21167615561. The reversal of 21167615530 is 3551676112.

It is a self number, because there is not a number n which added to its sum of digits gives 21167615530.

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 31 ways as a sum of consecutive naturals, for example, 11871019 + ... + 11872801.

It is an arithmetic number, because the mean of its divisors is an integer number (631193472).

Almost surely, 2^21167615530 is an apocalyptic number.

21167615530 is a deficient number, since it is larger than the sum of its proper divisors (19228766678).

21167615530 is a wasteful number, since it uses less digits than its factorization.

21167615530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 21167615530 in words is "twenty-one billion, one hundred sixty-seven million, six hundred fifteen thousand, five hundred thirty".