20525090500 has 48 divisors (see below), whose sum is σ = 44849750400. Its totient is φ = 8205832800.

The previous prime is 20525090477. The next prime is 20525090507. The reversal of 20525090500 is 509052502.

It is not an unprimeable number, because it can be changed into a prime (20525090507) 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, 1080081 + ... + 1098919.

It is an arithmetic number, because the mean of its divisors is an integer number (934369800).

Almost surely, 2^20525090500 is an apocalyptic number.

20525090500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20525090500 is an abundant number, since it is smaller than the sum of its proper divisors (24324659900).

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

20525090500 is a wasteful number, since it uses less digits than its factorization.

20525090500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21037 (or 21025 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 20525090500 in words is "twenty billion, five hundred twenty-five million, ninety thousand, five hundred".