23631229421 has 2 divisors, whose sum is σ = 23631229422. Its totient is φ = 23631229420.

The previous prime is 23631229417. The next prime is 23631229451. The reversal of 23631229421 is 12492213632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22931044900 + 700184521 = 151430^2 + 26461^2 .

It is a cyclic number.

It is not a de Polignac number, because 23631229421 - 2² = 23631229417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23631229451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11815614710 + 11815614711.

It is an arithmetic number, because the mean of its divisors is an integer number (11815614711).

Almost surely, 2^23631229421 is an apocalyptic number.

It is an amenable number.

23631229421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23631229421 is an equidigital number, since it uses as much as digits as its factorization.

23631229421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The spelling of 23631229421 in words is "twenty-three billion, six hundred thirty-one million, two hundred twenty-nine thousand, four hundred twenty-one".