23078513921 has 4 divisors (see below), whose sum is σ = 23822982144. Its totient is φ = 22334045700.

The previous prime is 23078513893. The next prime is 23078513923. The reversal of 23078513921 is 12931587032.

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 not a de Polignac number, because 23078513921 - 2¹⁴ = 23078497537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23078513923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372234065 + ... + 372234126.

It is an arithmetic number, because the mean of its divisors is an integer number (5955745536).

Almost surely, 2^23078513921 is an apocalyptic number.

It is an amenable number.

23078513921 is a deficient number, since it is larger than the sum of its proper divisors (744468223).

23078513921 is an equidigital number, since it uses as much as digits as its factorization.

23078513921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744468222.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 23078513921 in words is "twenty-three billion, seventy-eight million, five hundred thirteen thousand, nine hundred twenty-one".