23120202451 has 4 divisors (see below), whose sum is σ = 23129676504. Its totient is φ = 23110728400.

The previous prime is 23120202407. The next prime is 23120202503. The reversal of 23120202451 is 15420202132.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23120202451 - 2⁹ = 23120201939 is a prime.

It is a super-2 number, since 2×23120202451² (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 (23120202551) 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, 4733365 + ... + 4738246.

It is an arithmetic number, because the mean of its divisors is an integer number (5782419126).

Almost surely, 2^23120202451 is an apocalyptic number.

23120202451 is a deficient number, since it is larger than the sum of its proper divisors (9474053).

23120202451 is an equidigital number, since it uses as much as digits as its factorization.

23120202451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474052.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 23120202451 its reverse (15420202132), we get a palindrome (38540404583).

The spelling of 23120202451 in words is "twenty-three billion, one hundred twenty million, two hundred two thousand, four hundred fifty-one".