23204131021 has 16 divisors (see below), whose sum is σ = 24105288960. Its totient is φ = 22309927360.

The previous prime is 23204131009. The next prime is 23204131081. The reversal of 23204131021 is 12013140232.

It is a happy number.

It is not a de Polignac number, because 23204131021 - 2¹¹ = 23204128973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23204131021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23204131081) 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, 8160426 + ... + 8163268.

It is an arithmetic number, because the mean of its divisors is an integer number (1506580560).

Almost surely, 2^23204131021 is an apocalyptic number.

It is an amenable number.

23204131021 is a deficient number, since it is larger than the sum of its proper divisors (901157939).

23204131021 is a wasteful number, since it uses less digits than its factorization.

23204131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23204131021 its reverse (12013140232), we get a palindrome (35217271253).

The spelling of 23204131021 in words is "twenty-three billion, two hundred four million, one hundred thirty-one thousand, twenty-one".