18675723842 has 4 divisors (see below), whose sum is σ = 28013585766. Its totient is φ = 9337861920.

The previous prime is 18675723757. The next prime is 18675723967. The reversal of 18675723842 is 24832757681.

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., 18648360481 + 27363361 = 136559^2 + 5231^2 .

It is a super-2 number, since 2×18675723842² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4668930959 + ... + 4668930962.

Almost surely, 2^18675723842 is an apocalyptic number.

18675723842 is a deficient number, since it is larger than the sum of its proper divisors (9337861924).

18675723842 is an equidigital number, since it uses as much as digits as its factorization.

18675723842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9337861923.

The product of its digits is 4515840, while the sum is 53.

The spelling of 18675723842 in words is "eighteen billion, six hundred seventy-five million, seven hundred twenty-three thousand, eight hundred forty-two".