25420453220 has 24 divisors (see below), whose sum is σ = 55104983808. Its totient is φ = 9840175200.

The previous prime is 25420453217. The next prime is 25420453271. The reversal of 25420453220 is 2235402452.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20499746 + ... + 20500985.

It is an arithmetic number, because the mean of its divisors is an integer number (2296040992).

Almost surely, 2^25420453220 is an apocalyptic number.

25420453220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25420453220 is an abundant number, since it is smaller than the sum of its proper divisors (29684530588).

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

25420453220 is a wasteful number, since it uses less digits than its factorization.

25420453220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41000771 (or 41000769 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

Adding to 25420453220 its reverse (2235402452), we get a palindrome (27655855672).

The spelling of 25420453220 in words is "twenty-five billion, four hundred twenty million, four hundred fifty-three thousand, two hundred twenty".