1999182312 has 48 divisors (see below), whose sum is σ = 5589118080. Its totient is φ = 644896800.

The previous prime is 1999182257. The next prime is 1999182331. The reversal of 1999182312 is 2132819991.

It is a super-2 number, since 2×1999182312² = 7993459833227330688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 445614 + ... + 450077.

It is an arithmetic number, because the mean of its divisors is an integer number (116439960).

Almost surely, 2^1999182312 is an apocalyptic number.

1999182312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1999182312 is an abundant number, since it is smaller than the sum of its proper divisors (3589935768).

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

1999182312 is a wasteful number, since it uses less digits than its factorization.

1999182312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895734 (or 895727 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 1999182312 is about 44712.2165856268. The cubic root of 1999182312 is about 1259.7493227690.

The spelling of 1999182312 in words is "one billion, nine hundred ninety-nine million, one hundred eighty-two thousand, three hundred twelve".