25320022400 has 48 divisors (see below), whose sum is σ = 62548375740. Its totient is φ = 10128007680.

The previous prime is 25320022369. The next prime is 25320022417. The reversal of 25320022400 is 422002352.

It is a super-2 number, since 2×25320022400² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3953054 + ... + 3959453.

Almost surely, 2^25320022400 is an apocalyptic number.

25320022400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25320022400 is an abundant number, since it is smaller than the sum of its proper divisors (37228353340).

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

25320022400 is an equidigital number, since it uses as much as digits as its factorization.

25320022400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7912531 (or 7912514 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

Adding to 25320022400 its reverse (422002352), we get a palindrome (25742024752).

The spelling of 25320022400 in words is "twenty-five billion, three hundred twenty million, twenty-two thousand, four hundred".