18933061905 has 48 divisors (see below), whose sum is σ = 34363405440. Its totient is φ = 9999531648.

The previous prime is 18933061883. The next prime is 18933061909. The reversal of 18933061905 is 50916033981.

It is not a de Polignac number, because 18933061905 - 2¹⁷ = 18932930833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18933061909) 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 in 47 ways as a sum of consecutive naturals, for example, 49501 + ... + 200789.

It is an arithmetic number, because the mean of its divisors is an integer number (715904280).

Almost surely, 2^18933061905 is an apocalyptic number.

18933061905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18933061905 is a deficient number, since it is larger than the sum of its proper divisors (15430343535).

18933061905 is a wasteful number, since it uses less digits than its factorization.

18933061905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151412 (or 151400 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 18933061905 in words is "eighteen billion, nine hundred thirty-three million, sixty-one thousand, nine hundred five".