20748180 has 24 divisors (see below), whose sum is σ = 58095072. Its totient is φ = 5532832.

The previous prime is 20748179. The next prime is 20748191. The reversal of 20748180 is 8184702.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172842 + ... + 172961.

It is an arithmetic number, because the mean of its divisors is an integer number (2420628).

Almost surely, 2^20748180 is an apocalyptic number.

20748180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20748180 is an abundant number, since it is smaller than the sum of its proper divisors (37346892).

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

20748180 is a wasteful number, since it uses less digits than its factorization.

20748180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345815 (or 345813 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20748180 is about 4555.0170142383. The cubic root of 20748180 is about 274.7851986544.

The spelling of 20748180 in words is "twenty million, seven hundred forty-eight thousand, one hundred eighty".