18705874 has 16 divisors (see below), whose sum is σ = 30866976. Its totient is φ = 8501460.

The previous prime is 18705871. The next prime is 18705887. The reversal of 18705874 is 47850781.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18705871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852 + ... + 6175.

It is an arithmetic number, because the mean of its divisors is an integer number (1929186).

Almost surely, 2^18705874 is an apocalyptic number.

18705874 is a deficient number, since it is larger than the sum of its proper divisors (12161102).

18705874 is an equidigital number, since it uses as much as digits as its factorization.

18705874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062 (or 7040 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 18705874 is about 4325.0287860314. The cubic root of 18705874 is about 265.4560747209.

It can be divided in two parts, 1870 and 5874, that added together give a square (7744 = 88²).

The spelling of 18705874 in words is "eighteen million, seven hundred five thousand, eight hundred seventy-four".