18994330597 has 8 divisors (see below), whose sum is σ = 20723486400. Its totient is φ = 17265574560.

The previous prime is 18994330567. The next prime is 18994330627. The reversal of 18994330597 is 79503349981.

It is an interprime number because it is at equal distance from previous prime (18994330567) and next prime (18994330627).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18994330597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18994330547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4128 + ... + 194950.

It is an arithmetic number, because the mean of its divisors is an integer number (2590435800).

Almost surely, 2^18994330597 is an apocalyptic number.

It is an amenable number.

18994330597 is a deficient number, since it is larger than the sum of its proper divisors (1729155803).

18994330597 is a wasteful number, since it uses less digits than its factorization.

18994330597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199883.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 18994330597 in words is "eighteen billion, nine hundred ninety-four million, three hundred thirty thousand, five hundred ninety-seven".