18097970 has 24 divisors (see below), whose sum is σ = 35809452. Its totient is φ = 6580640.

The previous prime is 18097931. The next prime is 18097991. The reversal of 18097970 is 7979081.

It can be written as a sum of positive squares in 2 ways, for example, as 17380561 + 717409 = 4169^2 + 847^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6269 + ... + 8688.

Almost surely, 2^18097970 is an apocalyptic number.

18097970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18097970 is a deficient number, since it is larger than the sum of its proper divisors (17711482).

18097970 is a wasteful number, since it uses less digits than its factorization.

18097970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986 (or 14975 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 18097970 is about 4254.1708945457. The cubic root of 18097970 is about 262.5487498273.

It can be divided in two parts, 1809 and 7970, that added together give a palindrome (9779).

The spelling of 18097970 in words is "eighteen million, ninety-seven thousand, nine hundred seventy".