23921358919 has 2 divisors, whose sum is σ = 23921358920. Its totient is φ = 23921358918.

The previous prime is 23921358893. The next prime is 23921358941. The reversal of 23921358919 is 91985312932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23921358919 - 2⁹ = 23921358407 is a prime.

It is a super-2 number, since 2×23921358919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23921358959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11960679459 + 11960679460.

It is an arithmetic number, because the mean of its divisors is an integer number (11960679460).

Almost surely, 2^23921358919 is an apocalyptic number.

23921358919 is a deficient number, since it is larger than the sum of its proper divisors (1).

23921358919 is an equidigital number, since it uses as much as digits as its factorization.

23921358919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 52.

The spelling of 23921358919 in words is "twenty-three billion, nine hundred twenty-one million, three hundred fifty-eight thousand, nine hundred nineteen".