1918740172 has 6 divisors (see below), whose sum is σ = 3357795308. Its totient is φ = 959370084.

The previous prime is 1918740169. The next prime is 1918740193. The reversal of 1918740172 is 2710478191.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239842518 + ... + 239842525.

Almost surely, 2^1918740172 is an apocalyptic number.

It is an amenable number.

1918740172 is a deficient number, since it is larger than the sum of its proper divisors (1439055136).

1918740172 is a wasteful number, since it uses less digits than its factorization.

1918740172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479685047 (or 479685045 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1918740172 is about 43803.4264869770. The cubic root of 1918740172 is about 1242.6210971716.

The spelling of 1918740172 in words is "one billion, nine hundred eighteen million, seven hundred forty thousand, one hundred seventy-two".