17711854949 has 4 divisors (see below), whose sum is σ = 17712365964. Its totient is φ = 17711343936.

The previous prime is 17711854943. The next prime is 17711854961. The reversal of 17711854949 is 94945811771.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10428085924 + 7283769025 = 102118^2 + 85345^2 .

It is a cyclic number.

It is not a de Polignac number, because 17711854949 - 2¹⁶ = 17711789413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 17711854894 and 17711854903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17711854943) 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, 199412 + ... + 274205.

It is an arithmetic number, because the mean of its divisors is an integer number (4428091491).

Almost surely, 2^17711854949 is an apocalyptic number.

It is an amenable number.

17711854949 is a deficient number, since it is larger than the sum of its proper divisors (511015).

17711854949 is an equidigital number, since it uses as much as digits as its factorization.

17711854949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511014.

The product of its digits is 2540160, while the sum is 56.

The spelling of 17711854949 in words is "seventeen billion, seven hundred eleven million, eight hundred fifty-four thousand, nine hundred forty-nine".