23153513021 has 4 divisors (see below), whose sum is σ = 23200669344. Its totient is φ = 23106356700.

The previous prime is 23153512999. The next prime is 23153513041. The reversal of 23153513021 is 12031535132.

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 23153513021 - 2¹⁴ = 23153496637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23153513041) 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, 23577425 + ... + 23578406.

It is an arithmetic number, because the mean of its divisors is an integer number (5800167336).

Almost surely, 2^23153513021 is an apocalyptic number.

It is an amenable number.

23153513021 is a deficient number, since it is larger than the sum of its proper divisors (47156323).

23153513021 is an equidigital number, since it uses as much as digits as its factorization.

23153513021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47156322.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 23153513021 in words is "twenty-three billion, one hundred fifty-three million, five hundred thirteen thousand, twenty-one".