25497823020 has 96 divisors (see below), whose sum is σ = 74277912576. Its totient is φ = 6528211200.

The previous prime is 25497823009. The next prime is 25497823027. The reversal of 25497823020 is 2032879452.

It is not an unprimeable number, because it can be changed into a prime (25497823027) 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, 182250 + ... + 290190.

It is an arithmetic number, because the mean of its divisors is an integer number (773728256).

Almost surely, 2^25497823020 is an apocalyptic number.

25497823020 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 25497823020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37138956288).

25497823020 is an abundant number, since it is smaller than the sum of its proper divisors (48780089556).

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

25497823020 is a wasteful number, since it uses less digits than its factorization.

25497823020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108111 (or 108109 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 25497823020 in words is "twenty-five billion, four hundred ninety-seven million, eight hundred twenty-three thousand, twenty".