25522010420 has 24 divisors (see below), whose sum is σ = 53695313448. Its totient is φ = 10189929600.

The previous prime is 25522010389. The next prime is 25522010431. The reversal of 25522010420 is 2401022552.

It can be written as a sum of positive squares in 4 ways, for example, as 8468784676 + 17053225744 = 92026^2 + 130588^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168571 + ... + 1190210.

It is an arithmetic number, because the mean of its divisors is an integer number (2237304727).

Almost surely, 2^25522010420 is an apocalyptic number.

25522010420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25522010420 is an abundant number, since it is smaller than the sum of its proper divisors (28173303028).

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

25522010420 is a wasteful number, since it uses less digits than its factorization.

25522010420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359331 (or 2359329 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 25522010420 its reverse (2401022552), we get a palindrome (27923032972).

The spelling of 25522010420 in words is "twenty-five billion, five hundred twenty-two million, ten thousand, four hundred twenty".