23431424021 has 4 divisors (see below), whose sum is σ = 23520517152. Its totient is φ = 23342330892.

The previous prime is 23431423987. The next prime is 23431424053. The reversal of 23431424021 is 12042413432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23431424021 - 2⁶ = 23431423957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23431427021) 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 3 ways as a sum of consecutive naturals, for example, 44546171 + ... + 44546696.

It is an arithmetic number, because the mean of its divisors is an integer number (5880129288).

Almost surely, 2^23431424021 is an apocalyptic number.

It is an amenable number.

23431424021 is a deficient number, since it is larger than the sum of its proper divisors (89093131).

23431424021 is an equidigital number, since it uses as much as digits as its factorization.

23431424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89093130.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 23431424021 its reverse (12042413432), we get a palindrome (35473837453).

The spelling of 23431424021 in words is "twenty-three billion, four hundred thirty-one million, four hundred twenty-four thousand, twenty-one".