17942969047 has 4 divisors (see below), whose sum is σ = 18723098160. Its totient is φ = 17162839936.

The previous prime is 17942969041. The next prime is 17942969069. The reversal of 17942969047 is 74096924971.

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

It is a de Polignac number, because none of the positive numbers 2^k-17942969047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17942968982 and 17942969000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17942969041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390064522 + ... + 390064567.

It is an arithmetic number, because the mean of its divisors is an integer number (4680774540).

Almost surely, 2^17942969047 is an apocalyptic number.

17942969047 is a deficient number, since it is larger than the sum of its proper divisors (780129113).

17942969047 is an equidigital number, since it uses as much as digits as its factorization.

17942969047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780129112.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 17942969047 in words is "seventeen billion, nine hundred forty-two million, nine hundred sixty-nine thousand, forty-seven".