1831813994 has 12 divisors (see below), whose sum is σ = 2839219362. Its totient is φ = 886360680.

The previous prime is 1831813961. The next prime is 1831814063. The reversal of 1831813994 is 4993181381.

It can be written as a sum of positive squares in only one way, i.e., 1811608969 + 20205025 = 42563^2 + 4495^2 .

It is a super-2 number, since 2×1831813994² = 6711085017228464072, which contains 22 as substring.

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 in 5 ways as a sum of consecutive naturals, for example, 474617 + ... + 478460.

Almost surely, 2^1831813994 is an apocalyptic number.

1831813994 is a deficient number, since it is larger than the sum of its proper divisors (1007405368).

1831813994 is an equidigital number, since it uses as much as digits as its factorization.

1831813994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953141 (or 953110 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 1831813994 is about 42799.6961905105. The cubic root of 1831813994 is about 1223.5652215217.

The spelling of 1831813994 in words is "one billion, eight hundred thirty-one million, eight hundred thirteen thousand, nine hundred ninety-four".