20674180 has 24 divisors (see below), whose sum is σ = 43503768. Its totient is φ = 8252928.

The previous prime is 20674177. The next prime is 20674189. The reversal of 20674180 is 8147602.

It can be written as a sum of positive squares in 4 ways, for example, as 8156736 + 12517444 = 2856^2 + 3538^2 .

It is not an unprimeable number, because it can be changed into a prime (20674189) by changing a digit.

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, 15292 + ... + 16588.

It is an arithmetic number, because the mean of its divisors is an integer number (1812657).

Almost surely, 2^20674180 is an apocalyptic number.

20674180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20674180 is an abundant number, since it is smaller than the sum of its proper divisors (22829588).

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

20674180 is a wasteful number, since it uses less digits than its factorization.

20674180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103 (or 2101 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20674180 is about 4546.8868470636. The cubic root of 20674180 is about 274.4581285676.

The spelling of 20674180 in words is "twenty million, six hundred seventy-four thousand, one hundred eighty".