25533963 has 24 divisors (see below), whose sum is σ = 45395168. Its totient is φ = 13468032.

The previous prime is 25533941. The next prime is 25533971. The reversal of 25533963 is 36933552.

It is not a de Polignac number, because 25533963 - 2⁵ = 25533931 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25533973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14770 + ... + 16407.

Almost surely, 2^25533963 is an apocalyptic number.

25533963 is a deficient number, since it is larger than the sum of its proper divisors (19861205).

25533963 is a wasteful number, since it uses less digits than its factorization.

25533963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31203 (or 31200 counting only the distinct ones).

The product of its digits is 72900, while the sum is 36.

The square root of 25533963 is about 5053.1141883001. The cubic root of 25533963 is about 294.4688825200.

The spelling of 25533963 in words is "twenty-five million, five hundred thirty-three thousand, nine hundred sixty-three".