20756480 has 48 divisors (see below), whose sum is σ = 49827960. Its totient is φ = 8298496.

The previous prime is 20756479. The next prime is 20756503. The reversal of 20756480 is 8465702.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9227 + ... + 11253.

Almost surely, 2^20756480 is an apocalyptic number.

20756480 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 20756480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24913980).

20756480 is an abundant number, since it is smaller than the sum of its proper divisors (29071480).

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

20756480 is an equidigital number, since it uses as much as digits as its factorization.

20756480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054 (or 2034 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20756480 is about 4555.9280064549. The cubic root of 20756480 is about 274.8218350099.

The spelling of 20756480 in words is "twenty million, seven hundred fifty-six thousand, four hundred eighty".