18202001984 has 14 divisors (see below), whose sum is σ = 36119597814. Its totient is φ = 9101000960.

The previous prime is 18202001971. The next prime is 18202002001. The reversal of 18202001984 is 48910020281.

It can be written as a sum of positive squares in only one way, i.e., 16985387584 + 1216614400 = 130328^2 + 34880^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 142203077 + ... + 142203204.

Almost surely, 2^18202001984 is an apocalyptic number.

It is an amenable number.

18202001984 is a deficient number, since it is larger than the sum of its proper divisors (17917595830).

18202001984 is an equidigital number, since it uses as much as digits as its factorization.

18202001984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284406293 (or 284406283 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 18202001984 in words is "eighteen billion, two hundred two million, one thousand, nine hundred eighty-four".