25591202020 has 48 divisors (see below), whose sum is σ = 55089538560. Its totient is φ = 9981340544.

The previous prime is 25591202017. The next prime is 25591202023. The reversal of 25591202020 is 2020219552.

It is an interprime number because it is at equal distance from previous prime (25591202017) and next prime (25591202023).

It is a self number, because there is not a number n which added to its sum of digits gives 25591202020.

It is not an unprimeable number, because it can be changed into a prime (25591202023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202257 + ... + 303463.

It is an arithmetic number, because the mean of its divisors is an integer number (1147698720).

Almost surely, 2^25591202020 is an apocalyptic number.

25591202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25591202020 is an abundant number, since it is smaller than the sum of its proper divisors (29498336540).

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

25591202020 is a wasteful number, since it uses less digits than its factorization.

25591202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101532 (or 101530 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 25591202020 in words is "twenty-five billion, five hundred ninety-one million, two hundred two thousand, twenty".