18243980332 has 12 divisors (see below), whose sum is σ = 32529361536. Its totient is φ = 8949877040.

The previous prime is 18243980303. The next prime is 18243980353. The reversal of 18243980332 is 23308934281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43028044 + ... + 43028467.

It is an arithmetic number, because the mean of its divisors is an integer number (2710780128).

Almost surely, 2^18243980332 is an apocalyptic number.

It is an amenable number.

18243980332 is a deficient number, since it is larger than the sum of its proper divisors (14285381204).

18243980332 is a wasteful number, since it uses less digits than its factorization.

18243980332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86056568 (or 86056566 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 18243980332 in words is "eighteen billion, two hundred forty-three million, nine hundred eighty thousand, three hundred thirty-two".