20873560 has 32 divisors (see below), whose sum is σ = 47414160. Its totient is φ = 8269696.

The previous prime is 20873539. The next prime is 20873563. The reversal of 20873560 is 6537802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20873563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1842 + ... + 6718.

Almost surely, 2^20873560 is an apocalyptic number.

20873560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20873560 is an abundant number, since it is smaller than the sum of its proper divisors (26540600).

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

20873560 is a wasteful number, since it uses less digits than its factorization.

20873560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995 (or 4991 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20873560 is about 4568.7591313178. The cubic root of 20873560 is about 275.3375909123.

The spelling of 20873560 in words is "twenty million, eight hundred seventy-three thousand, five hundred sixty".