18049573376 has 20 divisors (see below), whose sum is σ = 36063894702. Its totient is φ = 9024786432.

The previous prime is 18049573369. The next prime is 18049573429. The reversal of 18049573376 is 67337594081.

It can be written as a sum of positive squares in only one way, i.e., 16544133376 + 1505440000 = 128624^2 + 38800^2 .

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, 17626025 + ... + 17627048.

Almost surely, 2^18049573376 is an apocalyptic number.

18049573376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18049573376 is a deficient number, since it is larger than the sum of its proper divisors (18014321326).

18049573376 is an frugal number, since it uses more digits than its factorization.

18049573376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35253091 (or 35253075 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 18049573376 in words is "eighteen billion, forty-nine million, five hundred seventy-three thousand, three hundred seventy-six".