20553760 has 24 divisors (see below), whose sum is σ = 48558636. Its totient is φ = 8221440.

The previous prime is 20553739. The next prime is 20553773. The reversal of 20553760 is 6735502.

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 1648656 = 4348^2 + 1284^2 .

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, 64071 + ... + 64390.

Almost surely, 2^20553760 is an apocalyptic number.

20553760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20553760 is an abundant number, since it is smaller than the sum of its proper divisors (28004876).

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

20553760 is a wasteful number, since it uses less digits than its factorization.

20553760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128476 (or 128468 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 20553760 is about 4533.6254807825. The cubic root of 20553760 is about 273.9242158146.

The spelling of 20553760 in words is "twenty million, five hundred fifty-three thousand, seven hundred sixty".