20793860 has 24 divisors (see below), whose sum is σ = 43991640. Its totient is φ = 8255744.

The previous prime is 20793859. The next prime is 20793931. The reversal of 20793860 is 6839702.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 20775364 = 136^2 + 4558^2 .

It is a super-2 number, since 2×20793860² = 864769227399200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20793860.

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, 1055 + ... + 6534.

It is an arithmetic number, because the mean of its divisors is an integer number (1832985).

Almost surely, 2^20793860 is an apocalyptic number.

20793860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20793860 is an abundant number, since it is smaller than the sum of its proper divisors (23197780).

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

20793860 is a wasteful number, since it uses less digits than its factorization.

20793860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735 (or 7733 counting only the distinct ones).

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

The square root of 20793860 is about 4560.0285086828. The cubic root of 20793860 is about 274.9867101016.

The spelling of 20793860 in words is "twenty million, seven hundred ninety-three thousand, eight hundred sixty".