20488900 has 36 divisors (see below), whose sum is σ = 44667280. Its totient is φ = 8157600.

The previous prime is 20488891. The next prime is 20488901. The reversal of 20488900 is 988402.

It is not an unprimeable number, because it can be changed into a prime (20488901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32791 + ... + 33409.

Almost surely, 2^20488900 is an apocalyptic number.

20488900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20488900 is an abundant number, since it is smaller than the sum of its proper divisors (24178380).

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

20488900 is a wasteful number, since it uses less digits than its factorization.

20488900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20488900 is about 4526.4666131542. The cubic root of 20488900 is about 273.6357779837.

The spelling of 20488900 in words is "twenty million, four hundred eighty-eight thousand, nine hundred".