17991414347 has 16 divisors (see below), whose sum is σ = 19284713280. Its totient is φ = 16724640768.

The previous prime is 17991414281. The next prime is 17991414373. The reversal of 17991414347 is 74341419971.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-17991414347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17991414295 and 17991414304.

It is not an unprimeable number, because it can be changed into a prime (17991416347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1502498 + ... + 1514424.

It is an arithmetic number, because the mean of its divisors is an integer number (1205294580).

Almost surely, 2^17991414347 is an apocalyptic number.

17991414347 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

17991414347 is a deficient number, since it is larger than the sum of its proper divisors (1293298933).

17991414347 is a wasteful number, since it uses less digits than its factorization.

17991414347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13030.

The product of its digits is 762048, while the sum is 50.

The spelling of 17991414347 in words is "seventeen billion, nine hundred ninety-one million, four hundred fourteen thousand, three hundred forty-seven".