22045723731 has 48 divisors (see below), whose sum is σ = 33847632000. Its totient is φ = 13787988480.

The previous prime is 22045723723. The next prime is 22045723771. The reversal of 22045723731 is 13732754022.

22045723731 is a `hidden beast` number, since 2 + 20 + 4 + 572 + 37 + 31 = 666.

It is not a de Polignac number, because 22045723731 - 2³ = 22045723723 is a prime.

It is a super-2 number, since 2×22045723731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22045723771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11669635 + ... + 11671523.

It is an arithmetic number, because the mean of its divisors is an integer number (705159000).

Almost surely, 2^22045723731 is an apocalyptic number.

22045723731 is a deficient number, since it is larger than the sum of its proper divisors (11801908269).

22045723731 is a wasteful number, since it uses less digits than its factorization.

22045723731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 22045723731 in words is "twenty-two billion, forty-five million, seven hundred twenty-three thousand, seven hundred thirty-one".