20688060 has 24 divisors (see below), whose sum is σ = 57926736. Its totient is φ = 5516800.

The previous prime is 20688043. The next prime is 20688071. The reversal of 20688060 is 6088602.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 172341 + ... + 172460.

It is an arithmetic number, because the mean of its divisors is an integer number (2413614).

Almost surely, 2^20688060 is an apocalyptic number.

20688060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20688060 is an abundant number, since it is smaller than the sum of its proper divisors (37238676).

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

20688060 is a wasteful number, since it uses less digits than its factorization.

20688060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344813 (or 344811 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20688060 is about 4548.4129100160. The cubic root of 20688060 is about 274.5195357047.

The spelling of 20688060 in words is "twenty million, six hundred eighty-eight thousand, sixty".