25663020 has 24 divisors (see below), whose sum is σ = 71856624. Its totient is φ = 6843456.

The previous prime is 25663003. The next prime is 25663037. The reversal of 25663020 is 2036652.

It is an interprime number because it is at equal distance from previous prime (25663003) and next prime (25663037).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213799 + ... + 213918.

It is an arithmetic number, because the mean of its divisors is an integer number (2994026).

Almost surely, 2^25663020 is an apocalyptic number.

25663020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25663020 is an abundant number, since it is smaller than the sum of its proper divisors (46193604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25663020 is a wasteful number, since it uses less digits than its factorization.

25663020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427729 (or 427727 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 25663020 is about 5065.8681388287. The cubic root of 25663020 is about 294.9641630315.

Adding to 25663020 its reverse (2036652), we get a palindrome (27699672).

The spelling of 25663020 in words is "twenty-five million, six hundred sixty-three thousand, twenty".