1812323685 has 16 divisors (see below), whose sum is σ = 2901306240. Its totient is φ = 966043200.

The previous prime is 1812323671. The next prime is 1812323731. The reversal of 1812323685 is 5863232181.

It is not a de Polignac number, because 1812323685 - 2¹² = 1812319589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3966 + ... + 60335.

It is an arithmetic number, because the mean of its divisors is an integer number (181331640).

Almost surely, 2^1812323685 is an apocalyptic number.

1812323685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1812323685 is a deficient number, since it is larger than the sum of its proper divisors (1088982555).

1812323685 is a wasteful number, since it uses less digits than its factorization.

1812323685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66188.

The product of its digits is 69120, while the sum is 39.

The square root of 1812323685 is about 42571.3951497951. The cubic root of 1812323685 is about 1219.2102039025.

The spelling of 1812323685 in words is "one billion, eight hundred twelve million, three hundred twenty-three thousand, six hundred eighty-five".