1868503818 has 16 divisors (see below), whose sum is σ = 3764286720. Its totient is φ = 618288096.

The previous prime is 1868503799. The next prime is 1868503823. The reversal of 1868503818 is 8183058681.

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, 1135738 + ... + 1137381.

It is an arithmetic number, because the mean of its divisors is an integer number (235267920).

Almost surely, 2^1868503818 is an apocalyptic number.

1868503818 is an abundant number, since it is smaller than the sum of its proper divisors (1895782902).

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

1868503818 is a wasteful number, since it uses less digits than its factorization.

1868503818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273261.

The product of its (nonzero) digits is 368640, while the sum is 48.

The square root of 1868503818 is about 43226.1936561618. The cubic root of 1868503818 is about 1231.6803037947.

The spelling of 1868503818 in words is "one billion, eight hundred sixty-eight million, five hundred three thousand, eight hundred eighteen".