20125320500 has 24 divisors (see below), whose sum is σ = 43953701064. Its totient is φ = 8050128000.

The previous prime is 20125320473. The next prime is 20125320517. The reversal of 20125320500 is 502352102.

It can be written as a sum of positive squares in 4 ways, for example, as 1500167824 + 18625152676 = 38732^2 + 136474^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 20124821 + ... + 20125820.

It is an arithmetic number, because the mean of its divisors is an integer number (1831404211).

Almost surely, 2^20125320500 is an apocalyptic number.

20125320500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20125320500 is an abundant number, since it is smaller than the sum of its proper divisors (23828380564).

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

20125320500 is a wasteful number, since it uses less digits than its factorization.

20125320500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40250660 (or 40250648 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20125320500 its reverse (502352102), we get a palindrome (20627672602).

The spelling of 20125320500 in words is "twenty billion, one hundred twenty-five million, three hundred twenty thousand, five hundred".