21373621764367 has 16 divisors (see below), whose sum is σ = 22109899252000. Its totient is φ = 20645701614720.

The previous prime is 21373621764323. The next prime is 21373621764373. The reversal of 21373621764367 is 76346712637312.

It is a cyclic number.

It is not a de Polignac number, because 21373621764367 - 2³⁹ = 20823865950479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373621794367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301082017 + ... + 301152997.

It is an arithmetic number, because the mean of its divisors is an integer number (1381868703250).

Almost surely, 2^{21373621764367} is an apocalyptic number.

21373621764367 is a deficient number, since it is larger than the sum of its proper divisors (736277487633).

21373621764367 is a wasteful number, since it uses less digits than its factorization.

21373621764367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129706.

The product of its digits is 32006016, while the sum is 58.

The spelling of 21373621764367 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred twenty-one million, seven hundred sixty-four thousand, three hundred sixty-seven".