18797970 has 16 divisors (see below), whose sum is σ = 45115200. Its totient is φ = 5012784.

The previous prime is 18797963. The next prime is 18797981. The reversal of 18797970 is 7979781.

It is a super-2 number, since 2×18797970² = 706727352241800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 313270 + ... + 313329.

It is an arithmetic number, because the mean of its divisors is an integer number (2819700).

Almost surely, 2^18797970 is an apocalyptic number.

18797970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18797970 is an abundant number, since it is smaller than the sum of its proper divisors (26317230).

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

18797970 is a wasteful number, since it uses less digits than its factorization.

18797970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626609.

The product of its (nonzero) digits is 222264, while the sum is 48.

The square root of 18797970 is about 4335.6625791221. The cubic root of 18797970 is about 265.8910081674.

The spelling of 18797970 in words is "eighteen million, seven hundred ninety-seven thousand, nine hundred seventy".