23021553403 has 4 divisors (see below), whose sum is σ = 23048993520. Its totient is φ = 22994113288.

The previous prime is 23021553389. The next prime is 23021553413. The reversal of 23021553403 is 30435512032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23021553403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23021553413) 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, 13718800 + ... + 13720477.

It is an arithmetic number, because the mean of its divisors is an integer number (5762248380).

Almost surely, 2^23021553403 is an apocalyptic number.

23021553403 is a deficient number, since it is larger than the sum of its proper divisors (27440117).

23021553403 is an equidigital number, since it uses as much as digits as its factorization.

23021553403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27440116.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 23021553403 in words is "twenty-three billion, twenty-one million, five hundred fifty-three thousand, four hundred three".