17994203137 has 4 divisors (see below), whose sum is σ = 18941266480. Its totient is φ = 17047139796.

The previous prime is 17994203131. The next prime is 17994203159. The reversal of 17994203137 is 73130249971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 17994203137 - 2³¹ = 15846719489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17994203131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473531643 + ... + 473531680.

It is an arithmetic number, because the mean of its divisors is an integer number (4735316620).

Almost surely, 2^17994203137 is an apocalyptic number.

It is an amenable number.

17994203137 is a deficient number, since it is larger than the sum of its proper divisors (947063343).

17994203137 is an equidigital number, since it uses as much as digits as its factorization.

17994203137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947063342.

The product of its (nonzero) digits is 285768, while the sum is 46.

The spelling of 17994203137 in words is "seventeen billion, nine hundred ninety-four million, two hundred three thousand, one hundred thirty-seven".