20873660 has 12 divisors (see below), whose sum is σ = 43834728. Its totient is φ = 8349456.

The previous prime is 20873653. The next prime is 20873663. The reversal of 20873660 is 6637802.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20873663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521822 + ... + 521861.

It is an arithmetic number, because the mean of its divisors is an integer number (3652894).

Almost surely, 2^20873660 is an apocalyptic number.

20873660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20873660 is an abundant number, since it is smaller than the sum of its proper divisors (22961068).

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

20873660 is a wasteful number, since it uses less digits than its factorization.

20873660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043692 (or 1043690 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20873660 is about 4568.7700751953. The cubic root of 20873660 is about 275.3380306028.

The spelling of 20873660 in words is "twenty million, eight hundred seventy-three thousand, six hundred sixty".