20456080 has 40 divisors (see below), whose sum is σ = 47802744. Its totient is φ = 8140800.

The previous prime is 20456053. The next prime is 20456081. The reversal of 20456080 is 8065402.

It can be written as a sum of positive squares in 4 ways, for example, as 5308416 + 15147664 = 2304^2 + 3892^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20456081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18750 + ... + 19810.

Almost surely, 2^20456080 is an apocalyptic number.

20456080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20456080 is an abundant number, since it is smaller than the sum of its proper divisors (27346664).

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

20456080 is a wasteful number, since it uses less digits than its factorization.

20456080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1309 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20456080 is about 4522.8398158679. The cubic root of 20456080 is about 273.4895927201.

The spelling of 20456080 in words is "twenty million, four hundred fifty-six thousand, eighty".