1812105957 has 8 divisors (see below), whose sum is σ = 2472330784. Its totient is φ = 1179975888.

The previous prime is 1812105941. The next prime is 1812105959. The reversal of 1812105957 is 7595012181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1812105957 - 2⁴ = 1812105941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812105959) 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 7 ways as a sum of consecutive naturals, for example, 7023538 + ... + 7023795.

It is an arithmetic number, because the mean of its divisors is an integer number (309041348).

Almost surely, 2^1812105957 is an apocalyptic number.

It is an amenable number.

1812105957 is a deficient number, since it is larger than the sum of its proper divisors (660224827).

1812105957 is a wasteful number, since it uses less digits than its factorization.

1812105957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14047379.

The product of its (nonzero) digits is 25200, while the sum is 39.

The square root of 1812105957 is about 42568.8378629250. The cubic root of 1812105957 is about 1219.1613776668.

The spelling of 1812105957 in words is "one billion, eight hundred twelve million, one hundred five thousand, nine hundred fifty-seven".