17942893523 has 4 divisors (see below), whose sum is σ = 18887256360. Its totient is φ = 16998530688.

The previous prime is 17942893513. The next prime is 17942893583. The reversal of 17942893523 is 32539824971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32539824971 = 73 ⋅445751027.

It is a cyclic number.

It is not a de Polignac number, because 17942893523 - 2³⁰ = 16869151699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17942893513) 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, 472181390 + ... + 472181427.

It is an arithmetic number, because the mean of its divisors is an integer number (4721814090).

Almost surely, 2^17942893523 is an apocalyptic number.

17942893523 is a deficient number, since it is larger than the sum of its proper divisors (944362837).

17942893523 is an equidigital number, since it uses as much as digits as its factorization.

17942893523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944362836.

The product of its digits is 3265920, while the sum is 53.

The spelling of 17942893523 in words is "seventeen billion, nine hundred forty-two million, eight hundred ninety-three thousand, five hundred twenty-three".