25020454400 has 120 divisors (see below), whose sum is σ = 62227502304. Its totient is φ = 9969868800.

The previous prime is 25020454387. The next prime is 25020454409. The reversal of 25020454400 is 445402052.

It is a self number, because there is not a number n which added to its sum of digits gives 25020454400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25020454409) 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, 3465194 + ... + 3472406.

Almost surely, 2^25020454400 is an apocalyptic number.

25020454400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25020454400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31113751152).

25020454400 is an abundant number, since it is smaller than the sum of its proper divisors (37207047904).

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

25020454400 is an equidigital number, since it uses as much as digits as its factorization.

25020454400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7512 (or 7491 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

Adding to 25020454400 its reverse (445402052), we get a palindrome (25465856452).

The spelling of 25020454400 in words is "twenty-five billion, twenty million, four hundred fifty-four thousand, four hundred".