25164420 has 48 divisors (see below), whose sum is σ = 74608128. Its totient is φ = 6315520.

The previous prime is 25164409. The next prime is 25164427. The reversal of 25164420 is 2446152.

It is not an unprimeable number, because it can be changed into a prime (25164427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11316 + ... + 13355.

It is an arithmetic number, because the mean of its divisors is an integer number (1554336).

Almost surely, 2^25164420 is an apocalyptic number.

25164420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25164420 is an abundant number, since it is smaller than the sum of its proper divisors (49443708).

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

25164420 is a wasteful number, since it uses less digits than its factorization.

25164420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24700 (or 24698 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25164420 is about 5016.4150545983. The cubic root of 25164420 is about 293.0413963029.

The spelling of 25164420 in words is "twenty-five million, one hundred sixty-four thousand, four hundred twenty".