18949583456 has 12 divisors (see below), whose sum is σ = 37306992492. Its totient is φ = 9474791712.

The previous prime is 18949583453. The next prime is 18949583461. The reversal of 18949583456 is 65438594981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949583453) by changing a digit.

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 as a sum of consecutive naturals, namely, 296087210 + ... + 296087273.

It is an arithmetic number, because the mean of its divisors is an integer number (3108916041).

Almost surely, 2^18949583456 is an apocalyptic number.

18949583456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18949583456 is a deficient number, since it is larger than the sum of its proper divisors (18357409036).

18949583456 is an equidigital number, since it uses as much as digits as its factorization.

18949583456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592174493 (or 592174485 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 62.

The spelling of 18949583456 in words is "eighteen billion, nine hundred forty-nine million, five hundred eighty-three thousand, four hundred fifty-six".