25018423 has 2 divisors, whose sum is σ = 25018424. Its totient is φ = 25018422.

The previous prime is 25018417. The next prime is 25018447. The reversal of 25018423 is 32481052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25018423 - 2⁹ = 25017911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25018463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12509211 + 12509212.

It is an arithmetic number, because the mean of its divisors is an integer number (12509212).

Almost surely, 2^25018423 is an apocalyptic number.

25018423 is a deficient number, since it is larger than the sum of its proper divisors (1).

25018423 is an equidigital number, since it uses as much as digits as its factorization.

25018423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 25018423 is about 5001.8419607181. The cubic root of 25018423 is about 292.4735817570.

Adding to 25018423 its reverse (32481052), we get a palindrome (57499475).

The spelling of 25018423 in words is "twenty-five million, eighteen thousand, four hundred twenty-three".