21536753107623 has 16 divisors (see below), whose sum is σ = 30953715248736. Its totient is φ = 13240895091840.

The previous prime is 21536753107591. The next prime is 21536753107627. The reversal of 21536753107623 is 32670135763512.

It is not a de Polignac number, because 21536753107623 - 2⁵ = 21536753107591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21536753107627) 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, 260196340 + ... + 260279097.

It is an arithmetic number, because the mean of its divisors is an integer number (1934607203046).

Almost surely, 2^{21536753107623} is an apocalyptic number.

21536753107623 is a deficient number, since it is larger than the sum of its proper divisors (9416962141113).

21536753107623 is a wasteful number, since it uses less digits than its factorization.

21536753107623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520476514.

The product of its (nonzero) digits is 4762800, while the sum is 51.

The spelling of 21536753107623 in words is "twenty-one trillion, five hundred thirty-six billion, seven hundred fifty-three million, one hundred seven thousand, six hundred twenty-three".