20780600 has 24 divisors (see below), whose sum is σ = 48315360. Its totient is φ = 8312160.

The previous prime is 20780581. The next prime is 20780657. The reversal of 20780600 is 608702.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51752 + ... + 52151.

It is an arithmetic number, because the mean of its divisors is an integer number (2013140).

Almost surely, 2^20780600 is an apocalyptic number.

20780600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20780600 is an abundant number, since it is smaller than the sum of its proper divisors (27534760).

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

20780600 is a wasteful number, since it uses less digits than its factorization.

20780600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103919 (or 103910 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20780600 is about 4558.5743385405. The cubic root of 20780600 is about 274.9282457420.

The spelling of 20780600 in words is "twenty million, seven hundred eighty thousand, six hundred".