23363575721 has 2 divisors, whose sum is σ = 23363575722. Its totient is φ = 23363575720.

The previous prime is 23363575673. The next prime is 23363575727. The reversal of 23363575721 is 12757536332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15672285721 + 7691290000 = 125189^2 + 87700^2 .

It is a cyclic number.

It is not a de Polignac number, because 23363575721 - 2³⁰ = 22289833897 is a prime.

It is not a weakly prime, because it can be changed into another prime (23363575727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11681787860 + 11681787861.

It is an arithmetic number, because the mean of its divisors is an integer number (11681787861).

Almost surely, 2^23363575721 is an apocalyptic number.

It is an amenable number.

23363575721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23363575721 is an equidigital number, since it uses as much as digits as its factorization.

23363575721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 44.

The spelling of 23363575721 in words is "twenty-three billion, three hundred sixty-three million, five hundred seventy-five thousand, seven hundred twenty-one".