21745622771431 has 32 divisors (see below), whose sum is σ = 24281181388800. Its totient is φ = 19344208980096.

The previous prime is 21745622771429. The next prime is 21745622771471. The reversal of 21745622771431 is 13417722654712.

It is not a de Polignac number, because 21745622771431 - 2¹ = 21745622771429 is a prime.

It is a super-2 number, since 2×21745622771431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21745622771401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36293970 + ... + 36888256.

It is an arithmetic number, because the mean of its divisors is an integer number (758786918400).

Almost surely, 2^{21745622771431} is an apocalyptic number.

21745622771431 is a deficient number, since it is larger than the sum of its proper divisors (2535558617369).

21745622771431 is a wasteful number, since it uses less digits than its factorization.

21745622771431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595063.

The product of its digits is 3951360, while the sum is 52.

The spelling of 21745622771431 in words is "twenty-one trillion, seven hundred forty-five billion, six hundred twenty-two million, seven hundred seventy-one thousand, four hundred thirty-one".