25422465420 has 216 divisors, whose sum is σ = 87056201232. Its totient is φ = 5996263680.

The previous prime is 25422465413. The next prime is 25422465437. The reversal of 25422465420 is 2456422452.

25422465420 is a `hidden beast` number, since 2 + 5 + 4 + 224 + 6 + 5 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 790087 + ... + 821633.

Almost surely, 2^25422465420 is an apocalyptic number.

25422465420 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 25422465420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43528100616).

25422465420 is an abundant number, since it is smaller than the sum of its proper divisors (61633735812).

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

25422465420 is a wasteful number, since it uses less digits than its factorization.

25422465420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31621 (or 31605 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 25422465420 its reverse (2456422452), we get a palindrome (27878887872).

The spelling of 25422465420 in words is "twenty-five billion, four hundred twenty-two million, four hundred sixty-five thousand, four hundred twenty".