18317970 has 48 divisors (see below), whose sum is σ = 51959232. Its totient is φ = 4440480.

The previous prime is 18317969. The next prime is 18317983. The reversal of 18317970 is 7971381.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8262 + ... + 10241.

It is an arithmetic number, because the mean of its divisors is an integer number (1082484).

Almost surely, 2^18317970 is an apocalyptic number.

18317970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18317970 is an abundant number, since it is smaller than the sum of its proper divisors (33641262).

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

18317970 is a wasteful number, since it uses less digits than its factorization.

18317970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18527 (or 18524 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 18317970 is about 4279.9497660603. The cubic root of 18317970 is about 263.6083206939.

It can be divided in two parts, 1831 and 7970, that added together give a square (9801 = 99²).

The spelling of 18317970 in words is "eighteen million, three hundred seventeen thousand, nine hundred seventy".