20775180 has 48 divisors (see below), whose sum is σ = 58522464. Its totient is φ = 5506560.

The previous prime is 20775137. The next prime is 20775191. The reversal of 20775180 is 8157702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 9904 + ... + 11816.

It is an arithmetic number, because the mean of its divisors is an integer number (1219218).

Almost surely, 2^20775180 is an apocalyptic number.

20775180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20775180 is an abundant number, since it is smaller than the sum of its proper divisors (37747284).

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

20775180 is a wasteful number, since it uses less digits than its factorization.

20775180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 20775180 is about 4557.9798156640. The cubic root of 20775180 is about 274.9043413847.

The spelling of 20775180 in words is "twenty million, seven hundred seventy-five thousand, one hundred eighty".