25420020 has 24 divisors (see below), whose sum is σ = 71176224. Its totient is φ = 6778656.

The previous prime is 25420007. The next prime is 25420033. The reversal of 25420020 is 2002452.

It is an interprime number because it is at equal distance from previous prime (25420007) and next prime (25420033).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 211774 + ... + 211893.

It is an arithmetic number, because the mean of its divisors is an integer number (2965676).

Almost surely, 2^25420020 is an apocalyptic number.

25420020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25420020 is an abundant number, since it is smaller than the sum of its proper divisors (45756204).

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

25420020 is a wasteful number, since it uses less digits than its factorization.

25420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423679 (or 423677 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 25420020 is about 5041.8270497906. The cubic root of 25420020 is about 294.0302157848.

Adding to 25420020 its reverse (2002452), we get a palindrome (27422472).

The spelling of 25420020 in words is "twenty-five million, four hundred twenty thousand, twenty".