20803180 has 12 divisors (see below), whose sum is σ = 43686720. Its totient is φ = 8321264.

The previous prime is 20803177. The next prime is 20803183. The reversal of 20803180 is 8130802.

It is an interprime number because it is at equal distance from previous prime (20803177) and next prime (20803183).

It is a super-2 number, since 2×20803180² = 865544596224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20803183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520060 + ... + 520099.

It is an arithmetic number, because the mean of its divisors is an integer number (3640560).

Almost surely, 2^20803180 is an apocalyptic number.

20803180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20803180 is an abundant number, since it is smaller than the sum of its proper divisors (22883540).

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

20803180 is a wasteful number, since it uses less digits than its factorization.

20803180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040168 (or 1040166 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20803180 is about 4561.0503176352. The cubic root of 20803180 is about 275.0277878256.

Adding to 20803180 its reverse (8130802), we get a palindrome (28933982).

The spelling of 20803180 in words is "twenty million, eight hundred three thousand, one hundred eighty".