25218923 has 2 divisors, whose sum is σ = 25218924. Its totient is φ = 25218922.

The previous prime is 25218917. The next prime is 25218929. The reversal of 25218923 is 32981252.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (25218917) and next prime (25218929).

It is a cyclic number.

It is not a de Polignac number, because 25218923 - 2⁶ = 25218859 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 25218923.

It is not a weakly prime, because it can be changed into another prime (25218929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12609461 + 12609462.

It is an arithmetic number, because the mean of its divisors is an integer number (12609462).

Almost surely, 2^25218923 is an apocalyptic number.

25218923 is a deficient number, since it is larger than the sum of its proper divisors (1).

25218923 is an equidigital number, since it uses as much as digits as its factorization.

25218923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 25218923 is about 5021.8445814262. The cubic root of 25218923 is about 293.2528074702.

The spelling of 25218923 in words is "twenty-five million, two hundred eighteen thousand, nine hundred twenty-three".