23047531421 has 2 divisors, whose sum is σ = 23047531422. Its totient is φ = 23047531420.

The previous prime is 23047531387. The next prime is 23047531483. The reversal of 23047531421 is 12413574032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22862952025 + 184579396 = 151205^2 + 13586^2 .

It is a cyclic number.

It is not a de Polignac number, because 23047531421 - 2¹⁸ = 23047269277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23047530421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11523765710 + 11523765711.

It is an arithmetic number, because the mean of its divisors is an integer number (11523765711).

Almost surely, 2^23047531421 is an apocalyptic number.

It is an amenable number.

23047531421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23047531421 is an equidigital number, since it uses as much as digits as its factorization.

23047531421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 23047531421 in words is "twenty-three billion, forty-seven million, five hundred thirty-one thousand, four hundred twenty-one".