20893760 has 28 divisors (see below), whose sum is σ = 49754028. Its totient is φ = 8357376.

The previous prime is 20893757. The next prime is 20893771. The reversal of 20893760 is 6739802.

It can be written as a sum of positive squares in 2 ways, for example, as 9388096 + 11505664 = 3064^2 + 3392^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20893760.

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, 32327 + ... + 32966.

Almost surely, 2^20893760 is an apocalyptic number.

20893760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20893760 is an abundant number, since it is smaller than the sum of its proper divisors (28860268).

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

20893760 is an equidigital number, since it uses as much as digits as its factorization.

20893760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65310 (or 65300 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20893760 is about 4570.9692626400. The cubic root of 20893760 is about 275.4263798904.

The spelling of 20893760 in words is "twenty million, eight hundred ninety-three thousand, seven hundred sixty".