18994564335 has 16 divisors (see below), whose sum is σ = 30613140576. Its totient is φ = 10056488448.

The previous prime is 18994564331. The next prime is 18994564357. The reversal of 18994564335 is 53346549981.

It is not a de Polignac number, because 18994564335 - 2² = 18994564331 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18994564331) 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 15 ways as a sum of consecutive naturals, for example, 4619494 + ... + 4623603.

It is an arithmetic number, because the mean of its divisors is an integer number (1913321286).

Almost surely, 2^18994564335 is an apocalyptic number.

18994564335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18994564335 is a deficient number, since it is larger than the sum of its proper divisors (11618576241).

18994564335 is a wasteful number, since it uses less digits than its factorization.

18994564335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9243242.

The product of its digits is 13996800, while the sum is 57.

The spelling of 18994564335 in words is "eighteen billion, nine hundred ninety-four million, five hundred sixty-four thousand, three hundred thirty-five".