18842542123 has 16 divisors (see below), whose sum is σ = 19269089280. Its totient is φ = 18422172000.

The previous prime is 18842542111. The next prime is 18842542141. The reversal of 18842542123 is 32124524881.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18842542123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18842542163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2677936 + ... + 2684962.

It is an arithmetic number, because the mean of its divisors is an integer number (1204318080).

Almost surely, 2^18842542123 is an apocalyptic number.

18842542123 is a deficient number, since it is larger than the sum of its proper divisors (426547157).

18842542123 is a wasteful number, since it uses less digits than its factorization.

18842542123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458.

The product of its digits is 122880, while the sum is 40.

The spelling of 18842542123 in words is "eighteen billion, eight hundred forty-two million, five hundred forty-two thousand, one hundred twenty-three".