25720750020 has 96 divisors (see below), whose sum is σ = 82518508800. Its totient is φ = 5863878144.

The previous prime is 25720750007. The next prime is 25720750021. The reversal of 25720750020 is 2005702752.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 25720750020.

It is not an unprimeable number, because it can be changed into a prime (25720750021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84666 + ... + 242094.

It is an arithmetic number, because the mean of its divisors is an integer number (859567800).

Almost surely, 2^25720750020 is an apocalyptic number.

25720750020 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 25720750020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41259254400).

25720750020 is an abundant number, since it is smaller than the sum of its proper divisors (56797758780).

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

25720750020 is a wasteful number, since it uses less digits than its factorization.

25720750020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157837 (or 157835 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The spelling of 25720750020 in words is "twenty-five billion, seven hundred twenty million, seven hundred fifty thousand, twenty".