1813394332 has 12 divisors (see below), whose sum is σ = 3185152096. Its totient is φ = 903350880.

The previous prime is 1813394327. The next prime is 1813394381. The reversal of 1813394332 is 2334933181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1813394291 and 1813394300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835353 + ... + 837520.

Almost surely, 2^1813394332 is an apocalyptic number.

It is an amenable number.

1813394332 is a deficient number, since it is larger than the sum of its proper divisors (1371757764).

1813394332 is a wasteful number, since it uses less digits than its factorization.

1813394332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673148 (or 1673146 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 1813394332 is about 42583.9680161443. The cubic root of 1813394332 is about 1219.4502432131.

The spelling of 1813394332 in words is "one billion, eight hundred thirteen million, three hundred ninety-four thousand, three hundred thirty-two".