17942423 has 4 divisors (see below), whose sum is σ = 18042840. Its totient is φ = 17842008.

The previous prime is 17942417. The next prime is 17942443. The reversal of 17942423 is 32424971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32424971 = 47 ⋅689893.

It is a cyclic number.

It is not a de Polignac number, because 17942423 - 2⁸ = 17942167 is a prime.

It is a super-2 number, since 2×17942423² = 643861086221858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17942423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17942413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49940 + ... + 50297.

It is an arithmetic number, because the mean of its divisors is an integer number (4510710).

Almost surely, 2^17942423 is an apocalyptic number.

17942423 is a deficient number, since it is larger than the sum of its proper divisors (100417).

17942423 is a wasteful number, since it uses less digits than its factorization.

17942423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100416.

The product of its digits is 12096, while the sum is 32.

The square root of 17942423 is about 4235.8497376560. The cubic root of 17942423 is about 261.7944068217.

The spelling of 17942423 in words is "seventeen million, nine hundred forty-two thousand, four hundred twenty-three".