23133787731 has 32 divisors (see below), whose sum is σ = 36308865600. Its totient is φ = 14507089920.

The previous prime is 23133787717. The next prime is 23133787741. The reversal of 23133787731 is 13778733132.

23133787731 is a `hidden beast` number, since 231 + 337 + 87 + 7 + 3 + 1 = 666.

It is not a de Polignac number, because 23133787731 - 2²⁶ = 23066678867 is a prime.

It is a super-2 number, since 2×23133787731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23133787741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 853711 + ... + 880391.

It is an arithmetic number, because the mean of its divisors is an integer number (1134652050).

Almost surely, 2^23133787731 is an apocalyptic number.

23133787731 is a deficient number, since it is larger than the sum of its proper divisors (13175077869).

23133787731 is a wasteful number, since it uses less digits than its factorization.

23133787731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28596 (or 28590 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The spelling of 23133787731 in words is "twenty-three billion, one hundred thirty-three million, seven hundred eighty-seven thousand, seven hundred thirty-one".