23364172621 has 2 divisors, whose sum is σ = 23364172622. Its totient is φ = 23364172620.

The previous prime is 23364172609. The next prime is 23364172631. The reversal of 23364172621 is 12627146332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17479748521 + 5884424100 = 132211^2 + 76710^2 .

It is a cyclic number.

It is not a de Polignac number, because 23364172621 - 2¹⁹ = 23363648333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23364172631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11682086310 + 11682086311.

It is an arithmetic number, because the mean of its divisors is an integer number (11682086311).

Almost surely, 2^23364172621 is an apocalyptic number.

It is an amenable number.

23364172621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23364172621 is an equidigital number, since it uses as much as digits as its factorization.

23364172621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 37.

The spelling of 23364172621 in words is "twenty-three billion, three hundred sixty-four million, one hundred seventy-two thousand, six hundred twenty-one".