20787160 has 32 divisors (see below), whose sum is σ = 47770560. Its totient is φ = 8137216.

The previous prime is 20787157. The next prime is 20787187. The reversal of 20787160 is 6178702.

It is a happy number.

It is a congruent number.

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, 3649 + ... + 7408.

It is an arithmetic number, because the mean of its divisors is an integer number (1492830).

Almost surely, 2^20787160 is an apocalyptic number.

20787160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20787160 is an abundant number, since it is smaller than the sum of its proper divisors (26983400).

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

20787160 is a wasteful number, since it uses less digits than its factorization.

20787160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11115 (or 11111 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 20787160 is about 4559.2938049659. The cubic root of 20787160 is about 274.9571723939.

The spelling of 20787160 in words is "twenty million, seven hundred eighty-seven thousand, one hundred sixty".