21373602164005 has 16 divisors (see below), whose sum is σ = 31567166273664. Its totient is φ = 13528785545280.

The previous prime is 21373602163933. The next prime is 21373602164113. The reversal of 21373602164005 is 50046120637312.

It is a happy number.

It is not a de Polignac number, because 21373602164005 - 2¹⁹ = 21373601639717 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, 23487474451 + ... + 23487475360.

It is an arithmetic number, because the mean of its divisors is an integer number (1972947892104).

Almost surely, 2^{21373602164005} is an apocalyptic number.

It is an amenable number.

21373602164005 is a deficient number, since it is larger than the sum of its proper divisors (10193564109659).

21373602164005 is a wasteful number, since it uses less digits than its factorization.

21373602164005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46974949836.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 21373602164005 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred two million, one hundred sixty-four thousand, five".