18332778332 has 12 divisors (see below), whose sum is σ = 34998940536. Its totient is φ = 8333081040.

The previous prime is 18332778329. The next prime is 18332778353. The reversal of 18332778332 is 23387723381.

It is a super-2 number, since 2×18332778332² (a number of 21 digits) contains 22 as substring.

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, 208326983 + ... + 208327070.

It is an arithmetic number, because the mean of its divisors is an integer number (2916578378).

Almost surely, 2^18332778332 is an apocalyptic number.

It is an amenable number.

18332778332 is a deficient number, since it is larger than the sum of its proper divisors (16666162204).

18332778332 is a wasteful number, since it uses less digits than its factorization.

18332778332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416654068 (or 416654066 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The spelling of 18332778332 in words is "eighteen billion, three hundred thirty-two million, seven hundred seventy-eight thousand, three hundred thirty-two".