1816811942 has 16 divisors (see below), whose sum is σ = 2976348672. Its totient is φ = 824883720.

The previous prime is 1816811911. The next prime is 1816811959. The reversal of 1816811942 is 2491186181.

It is a super-2 number, since 2×1816811942² = 6601611265187622728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1816811942.

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, 27038 + ... + 66065.

It is an arithmetic number, because the mean of its divisors is an integer number (186021792).

Almost surely, 2^1816811942 is an apocalyptic number.

1816811942 is a deficient number, since it is larger than the sum of its proper divisors (1159536730).

1816811942 is a wasteful number, since it uses less digits than its factorization.

1816811942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94003.

The product of its digits is 27648, while the sum is 41.

The square root of 1816811942 is about 42624.0770222652. The cubic root of 1816811942 is about 1220.2158406076.

The spelling of 1816811942 in words is "one billion, eight hundred sixteen million, eight hundred eleven thousand, nine hundred forty-two".