23204140551 has 40 divisors (see below), whose sum is σ = 35252236800. Its totient is φ = 15207711120.

The previous prime is 23204140549. The next prime is 23204140559. The reversal of 23204140551 is 15504140232.

23204140551 is a `hidden beast` number, since 2 + 3 + 204 + 1 + 405 + 51 = 666.

It is not a de Polignac number, because 23204140551 - 2¹ = 23204140549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23204140559) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2058990 + ... + 2070228.

It is an arithmetic number, because the mean of its divisors is an integer number (881305920).

Almost surely, 2^23204140551 is an apocalyptic number.

23204140551 is a deficient number, since it is larger than the sum of its proper divisors (12048096249).

23204140551 is a wasteful number, since it uses less digits than its factorization.

23204140551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11681 (or 11672 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 23204140551 its reverse (15504140232), we get a palindrome (38708280783).

The spelling of 23204140551 in words is "twenty-three billion, two hundred four million, one hundred forty thousand, five hundred fifty-one".