18945563332 has 24 divisors (see below), whose sum is σ = 33304672800. Its totient is φ = 9429984000.

The previous prime is 18945563257. The next prime is 18945563341. The reversal of 18945563332 is 23336554981.

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 7 ways as a sum of consecutive naturals, for example, 2473044 + ... + 2480692.

It is an arithmetic number, because the mean of its divisors is an integer number (1387694700).

Almost surely, 2^18945563332 is an apocalyptic number.

It is an amenable number.

18945563332 is a deficient number, since it is larger than the sum of its proper divisors (14359109468).

18945563332 is a wasteful number, since it uses less digits than its factorization.

18945563332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10371 (or 10369 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 49.

The spelling of 18945563332 in words is "eighteen billion, nine hundred forty-five million, five hundred sixty-three thousand, three hundred thirty-two".