23857039919 has 2 divisors, whose sum is σ = 23857039920. Its totient is φ = 23857039918.

The previous prime is 23857039891. The next prime is 23857039933. The reversal of 23857039919 is 91993075832.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23857039919 - 2²⁸ = 23588604463 is a prime.

It is a super-2 number, since 2×23857039919² (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 (23857039949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11928519959 + 11928519960.

It is an arithmetic number, because the mean of its divisors is an integer number (11928519960).

Almost surely, 2^23857039919 is an apocalyptic number.

23857039919 is a deficient number, since it is larger than the sum of its proper divisors (1).

23857039919 is an equidigital number, since it uses as much as digits as its factorization.

23857039919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 23857039919 in words is "twenty-three billion, eight hundred fifty-seven million, thirty-nine thousand, nine hundred nineteen".