23421955 has 4 divisors (see below), whose sum is σ = 28106352. Its totient is φ = 18737560.

The previous prime is 23421899. The next prime is 23421961. The reversal of 23421955 is 55912432.

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

It is not a de Polignac number, because 23421955 - 2⁹ = 23421443 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342191 + ... + 2342200.

It is an arithmetic number, because the mean of its divisors is an integer number (7026588).

Almost surely, 2^23421955 is an apocalyptic number.

23421955 is a deficient number, since it is larger than the sum of its proper divisors (4684397).

23421955 is an equidigital number, since it uses as much as digits as its factorization.

23421955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684396.

The product of its digits is 10800, while the sum is 31.

The square root of 23421955 is about 4839.6234357644. The cubic root of 23421955 is about 286.1152770172.

The spelling of 23421955 in words is "twenty-three million, four hundred twenty-one thousand, nine hundred fifty-five".