25518923 has 4 divisors (see below), whose sum is σ = 25937328. Its totient is φ = 25100520.

The previous prime is 25518901. The next prime is 25518943. The reversal of 25518923 is 32981552.

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 25518923 - 2¹⁴ = 25502539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25518943) 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, 209111 + ... + 209232.

It is an arithmetic number, because the mean of its divisors is an integer number (6484332).

Almost surely, 2^25518923 is an apocalyptic number.

25518923 is a deficient number, since it is larger than the sum of its proper divisors (418405).

25518923 is an equidigital number, since it uses as much as digits as its factorization.

25518923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418404.

The product of its digits is 21600, while the sum is 35.

The square root of 25518923 is about 5051.6257779056. The cubic root of 25518923 is about 294.4110552015.

The spelling of 25518923 in words is "twenty-five million, five hundred eighteen thousand, nine hundred twenty-three".