21164012026502 has 4 divisors (see below), whose sum is σ = 31746018039756. Its totient is φ = 10582006013250.

The previous prime is 21164012026499. The next prime is 21164012026513. The reversal of 21164012026502 is 20562021046112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5291003006624 + ... + 5291003006627.

It is an arithmetic number, because the mean of its divisors is an integer number (7936504509939).

Almost surely, 2^{21164012026502} is an apocalyptic number.

21164012026502 is a deficient number, since it is larger than the sum of its proper divisors (10582006013254).

21164012026502 is a wasteful number, since it uses less digits than its factorization.

21164012026502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582006013253.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 21164012026502 in words is "twenty-one trillion, one hundred sixty-four billion, twelve million, twenty-six thousand, five hundred two".