21373537756751 has 8 divisors (see below), whose sum is σ = 22500317500800. Its totient is φ = 20246943683160.

The previous prime is 21373537756723. The next prime is 21373537756759. The reversal of 21373537756751 is 15765773537312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21373537756751 - 2²⁶ = 21373470647887 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 (21373537756759) 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 7 ways as a sum of consecutive naturals, for example, 46181285 + ... + 46641806.

It is an arithmetic number, because the mean of its divisors is an integer number (2812539687600).

Almost surely, 2^{21373537756751} is an apocalyptic number.

21373537756751 is a deficient number, since it is larger than the sum of its proper divisors (1126779744049).

21373537756751 is a wasteful number, since it uses less digits than its factorization.

21373537756751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92835229.

The product of its digits is 97240500, while the sum is 62.

The spelling of 21373537756751 in words is "twenty-one trillion, three hundred seventy-three billion, five hundred thirty-seven million, seven hundred fifty-six thousand, seven hundred fifty-one".