23619704557 has 4 divisors (see below), whose sum is σ = 23664867040. Its totient is φ = 23574542076.

The previous prime is 23619704551. The next prime is 23619704597. The reversal of 23619704557 is 75540791632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23619704557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23619704557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23619704551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22580457 + ... + 22581502.

It is an arithmetic number, because the mean of its divisors is an integer number (5916216760).

Almost surely, 2^23619704557 is an apocalyptic number.

It is an amenable number.

23619704557 is a deficient number, since it is larger than the sum of its proper divisors (45162483).

23619704557 is an equidigital number, since it uses as much as digits as its factorization.

23619704557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45162482.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 23619704557 in words is "twenty-three billion, six hundred nineteen million, seven hundred four thousand, five hundred fifty-seven".