1812114993 has 16 divisors (see below), whose sum is σ = 2603241536. Its totient is φ = 1114620480.

The previous prime is 1812114937. The next prime is 1812115043. The reversal of 1812114993 is 3994112181.

It is not a de Polignac number, because 1812114993 - 2⁶ = 1812114929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812115993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82671 + ... + 102267.

It is an arithmetic number, because the mean of its divisors is an integer number (162702596).

Almost surely, 2^1812114993 is an apocalyptic number.

1812114993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1812114993 is a deficient number, since it is larger than the sum of its proper divisors (791126543).

1812114993 is a wasteful number, since it uses less digits than its factorization.

1812114993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21984.

The product of its digits is 15552, while the sum is 39.

The square root of 1812114993 is about 42568.9439967683. The cubic root of 1812114993 is about 1219.1634040980.

The spelling of 1812114993 in words is "one billion, eight hundred twelve million, one hundred fourteen thousand, nine hundred ninety-three".