20488720 has 40 divisors (see below), whose sum is σ = 54442944. Its totient is φ = 7024512.

The previous prime is 20488717. The next prime is 20488751. The reversal of 20488720 is 2788402.

It is a tau number, because it is divible by the number of its divisors (40).

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, 17734 + ... + 18853.

Almost surely, 2^20488720 is an apocalyptic number.

20488720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20488720 is an abundant number, since it is smaller than the sum of its proper divisors (33954224).

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

20488720 is a wasteful number, since it uses less digits than its factorization.

20488720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36607 (or 36601 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 20488720 is about 4526.4467300522. The cubic root of 20488720 is about 273.6349766622.

The spelling of 20488720 in words is "twenty million, four hundred eighty-eight thousand, seven hundred twenty".