20091180 has 48 divisors (see below), whose sum is σ = 56818944. Its totient is φ = 5304000.

The previous prime is 20091179. The next prime is 20091233. The reversal of 20091180 is 8119002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4555 + ... + 7805.

It is an arithmetic number, because the mean of its divisors is an integer number (1183728).

Almost surely, 2^20091180 is an apocalyptic number.

20091180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20091180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28409472).

20091180 is an abundant number, since it is smaller than the sum of its proper divisors (36727764).

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

20091180 is a wasteful number, since it uses less digits than its factorization.

20091180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366 (or 3364 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 20091180 is about 4482.3185964409. The cubic root of 20091180 is about 271.8536373755.

The spelling of 20091180 in words is "twenty million, ninety-one thousand, one hundred eighty".