17712989474 has 4 divisors (see below), whose sum is σ = 26569484214. Its totient is φ = 8856494736.

The previous prime is 17712989449. The next prime is 17712989479. The reversal of 17712989474 is 47498921771.

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

It can be written as a sum of positive squares in only one way, i.e., 15945375625 + 1767613849 = 126275^2 + 42043^2 .

It is a super-2 number, since 2×17712989474² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17712989479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4428247367 + ... + 4428247370.

Almost surely, 2^17712989474 is an apocalyptic number.

17712989474 is a deficient number, since it is larger than the sum of its proper divisors (8856494740).

17712989474 is an equidigital number, since it uses as much as digits as its factorization.

17712989474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856494739.

The product of its digits is 7112448, while the sum is 59.

The spelling of 17712989474 in words is "seventeen billion, seven hundred twelve million, nine hundred eighty-nine thousand, four hundred seventy-four".