25503863 has 12 divisors (see below), whose sum is σ = 32365512. Its totient is φ = 19872720.

The previous prime is 25503857. The next prime is 25503869. The reversal of 25503863 is 36830552.

It is an interprime number because it is at equal distance from previous prime (25503857) and next prime (25503869).

It is not a de Polignac number, because 25503863 - 2¹⁴ = 25487479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25503869) 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, 23120 + ... + 24197.

It is an arithmetic number, because the mean of its divisors is an integer number (2697126).

Almost surely, 2^25503863 is an apocalyptic number.

25503863 is a deficient number, since it is larger than the sum of its proper divisors (6861649).

25503863 is a wasteful number, since it uses less digits than its factorization.

25503863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47342 (or 47335 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 25503863 is about 5050.1349486920. The cubic root of 25503863 is about 294.3531282142.

The spelling of 25503863 in words is "twenty-five million, five hundred three thousand, eight hundred sixty-three".