23420725 has 12 divisors (see below), whose sum is σ = 29176704. Its totient is φ = 18649520.

The previous prime is 23420689. The next prime is 23420729. The reversal of 23420725 is 52702432.

It is not a de Polignac number, because 23420725 - 2⁹ = 23420213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 23420725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23420729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3612 + ... + 7738.

It is an arithmetic number, because the mean of its divisors is an integer number (2431392).

Almost surely, 2^23420725 is an apocalyptic number.

23420725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23420725 is a deficient number, since it is larger than the sum of its proper divisors (5755979).

23420725 is a wasteful number, since it uses less digits than its factorization.

23420725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364 (or 4359 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 23420725 is about 4839.4963580935. The cubic root of 23420725 is about 286.1102684977.

The spelling of 23420725 in words is "twenty-three million, four hundred twenty thousand, seven hundred twenty-five".