18828745 has 16 divisors (see below), whose sum is σ = 24993360. Its totient is φ = 13526784.

The previous prime is 18828737. The next prime is 18828757. The reversal of 18828745 is 54782881.

It can be written as a sum of positive squares in 8 ways, for example, as 1121481 + 17707264 = 1059^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 18828745 - 2³ = 18828737 is a prime.

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, 1510 + ... + 6319.

It is an arithmetic number, because the mean of its divisors is an integer number (1562085).

Almost surely, 2^18828745 is an apocalyptic number.

It is an amenable number.

18828745 is a deficient number, since it is larger than the sum of its proper divisors (6164615).

18828745 is a wasteful number, since it uses less digits than its factorization.

18828745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884.

The product of its digits is 143360, while the sum is 43.

The square root of 18828745 is about 4339.2101815883. The cubic root of 18828745 is about 266.0360297550.

The spelling of 18828745 in words is "eighteen million, eight hundred twenty-eight thousand, seven hundred forty-five".