21500157363051 has 16 divisors (see below), whose sum is σ = 30353593809024. Its totient is φ = 13490103494784.

The previous prime is 21500157363001. The next prime is 21500157363089. The reversal of 21500157363051 is 15036375100512.

It is not a de Polignac number, because 21500157363051 - 2³¹ = 21498009879403 is a prime.

It is a super-2 number, since 2×21500157363051² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21500157363001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685800 + ... + 6593226.

It is an arithmetic number, because the mean of its divisors is an integer number (1897099613064).

Almost surely, 2^{21500157363051} is an apocalyptic number.

21500157363051 is a deficient number, since it is larger than the sum of its proper divisors (8853436445973).

21500157363051 is a wasteful number, since it uses less digits than its factorization.

21500157363051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978810.

The product of its (nonzero) digits is 94500, while the sum is 39.

The spelling of 21500157363051 in words is "twenty-one trillion, five hundred billion, one hundred fifty-seven million, three hundred sixty-three thousand, fifty-one".