20986180 has 24 divisors (see below), whose sum is σ = 44694720. Its totient is φ = 8275680.

The previous prime is 20986171. The next prime is 20986181. The reversal of 20986180 is 8168902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20986181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5970 + ... + 8809.

It is an arithmetic number, because the mean of its divisors is an integer number (1862280).

Almost surely, 2^20986180 is an apocalyptic number.

20986180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20986180 is an abundant number, since it is smaller than the sum of its proper divisors (23708540).

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

20986180 is a wasteful number, since it uses less digits than its factorization.

20986180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14859 (or 14857 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 20986180 is about 4581.0675611696. The cubic root of 20986180 is about 275.8318831949.

The spelling of 20986180 in words is "twenty million, nine hundred eighty-six thousand, one hundred eighty".