23195594621 has 2 divisors, whose sum is σ = 23195594622. Its totient is φ = 23195594620.

The previous prime is 23195594593. The next prime is 23195594633. The reversal of 23195594621 is 12649559132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21744746521 + 1450848100 = 147461^2 + 38090^2 .

It is a cyclic number.

It is not a de Polignac number, because 23195594621 - 2²² = 23191400317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23195594671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11597797310 + 11597797311.

It is an arithmetic number, because the mean of its divisors is an integer number (11597797311).

Almost surely, 2^23195594621 is an apocalyptic number.

It is an amenable number.

23195594621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23195594621 is an equidigital number, since it uses as much as digits as its factorization.

23195594621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The spelling of 23195594621 in words is "twenty-three billion, one hundred ninety-five million, five hundred ninety-four thousand, six hundred twenty-one".