1818197974 has 16 divisors (see below), whose sum is σ = 2888838000. Its totient is φ = 855293184.

The previous prime is 1818197947. The next prime is 1818197981. The reversal of 1818197974 is 4797918181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94897 + ... + 112435.

It is an arithmetic number, because the mean of its divisors is an integer number (180552375).

Almost surely, 2^1818197974 is an apocalyptic number.

1818197974 is a deficient number, since it is larger than the sum of its proper divisors (1070640026).

1818197974 is a wasteful number, since it uses less digits than its factorization.

1818197974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20607.

The product of its digits is 1016064, while the sum is 55.

The square root of 1818197974 is about 42640.3327144618. The cubic root of 1818197974 is about 1220.5260595250.

The spelling of 1818197974 in words is "one billion, eight hundred eighteen million, one hundred ninety-seven thousand, nine hundred seventy-four".