21150356464015 has 16 divisors (see below), whose sum is σ = 25397019648000. Its totient is φ = 16909224989472.

The previous prime is 21150356463997. The next prime is 21150356464031. The reversal of 21150356464015 is 51046465305112.

It is a cyclic number.

It is not a de Polignac number, because 21150356464015 - 2⁹ = 21150356463503 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192013126 + ... + 192123244.

It is an arithmetic number, because the mean of its divisors is an integer number (1587313728000).

Almost surely, 2^{21150356464015} is an apocalyptic number.

21150356464015 is a deficient number, since it is larger than the sum of its proper divisors (4246663183985).

21150356464015 is a wasteful number, since it uses less digits than its factorization.

21150356464015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134886.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 21150356464015 in words is "twenty-one trillion, one hundred fifty billion, three hundred fifty-six million, four hundred sixty-four thousand, fifteen".