23920451 has 4 divisors (see below), whose sum is σ = 23966712. Its totient is φ = 23874192.

The previous prime is 23920433. The next prime is 23920453. The reversal of 23920451 is 15402932.

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 23920451 - 2⁶ = 23920387 is a prime.

It is a super-3 number, since 3×23920451³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23920451.

It is not an unprimeable number, because it can be changed into a prime (23920453) 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, 22346 + ... + 23391.

It is an arithmetic number, because the mean of its divisors is an integer number (5991678).

Almost surely, 2^23920451 is an apocalyptic number.

23920451 is a deficient number, since it is larger than the sum of its proper divisors (46261).

23920451 is an equidigital number, since it uses as much as digits as its factorization.

23920451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46260.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 23920451 is about 4890.8538109414. The cubic root of 23920451 is about 288.1308682182.

The spelling of 23920451 in words is "twenty-three million, nine hundred twenty thousand, four hundred fifty-one".