17906049957 has 4 divisors (see below), whose sum is σ = 23874733280. Its totient is φ = 11937366636.

The previous prime is 17906049943. The next prime is 17906050013. The reversal of 17906049957 is 75994060971.

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 17906049957 - 2⁶ = 17906049893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17906049897 and 17906049906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17906041957) 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, 2984341657 + ... + 2984341662.

It is an arithmetic number, because the mean of its divisors is an integer number (5968683320).

Almost surely, 2^17906049957 is an apocalyptic number.

It is an amenable number.

17906049957 is a deficient number, since it is larger than the sum of its proper divisors (5968683323).

17906049957 is an equidigital number, since it uses as much as digits as its factorization.

17906049957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968683322.

The product of its (nonzero) digits is 4286520, while the sum is 57.

The spelling of 17906049957 in words is "seventeen billion, nine hundred six million, forty-nine thousand, nine hundred fifty-seven".