23928693457 has 8 divisors (see below), whose sum is σ = 24205095720. Its totient is φ = 23653065600.

The previous prime is 23928693407. The next prime is 23928693463. The reversal of 23928693457 is 75439682932.

It can be written as a sum of positive squares in 4 ways, for example, as 713904961 + 23214788496 = 26719^2 + 152364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23928693457 is a prime.

It is a super-2 number, since 2×23928693457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23928693407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131332 + ... + 255157.

It is an arithmetic number, because the mean of its divisors is an integer number (3025636965).

Almost surely, 2^23928693457 is an apocalyptic number.

It is an amenable number.

23928693457 is a deficient number, since it is larger than the sum of its proper divisors (276402263).

23928693457 is a wasteful number, since it uses less digits than its factorization.

23928693457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387203.

The product of its digits is 19595520, while the sum is 58.

The spelling of 23928693457 in words is "twenty-three billion, nine hundred twenty-eight million, six hundred ninety-three thousand, four hundred fifty-seven".