23677118821 has 2 divisors, whose sum is σ = 23677118822. Its totient is φ = 23677118820.

The previous prime is 23677118813. The next prime is 23677118833. The reversal of 23677118821 is 12881177632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12850716321 + 10826402500 = 113361^2 + 104050^2 .

It is a cyclic number.

It is not a de Polignac number, because 23677118821 - 2³ = 23677118813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23677118021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11838559410 + 11838559411.

It is an arithmetic number, because the mean of its divisors is an integer number (11838559411).

Almost surely, 2^23677118821 is an apocalyptic number.

It is an amenable number.

23677118821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23677118821 is an equidigital number, since it uses as much as digits as its factorization.

23677118821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The spelling of 23677118821 in words is "twenty-three billion, six hundred seventy-seven million, one hundred eighteen thousand, eight hundred twenty-one".