18608940243 has 24 divisors (see below), whose sum is σ = 27918726960. Its totient is φ = 12401707176.

The previous prime is 18608940241. The next prime is 18608940263. The reversal of 18608940243 is 34204980681.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

18608940243 is a `hidden beast` number, since 18 + 608 + 9 + 4 + 0 + 24 + 3 = 666.

It is not a de Polignac number, because 18608940243 - 2¹ = 18608940241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18608940241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6378021 + ... + 6380937.

It is an arithmetic number, because the mean of its divisors is an integer number (1163280290).

Almost surely, 2^18608940243 is an apocalyptic number.

18608940243 is a deficient number, since it is larger than the sum of its proper divisors (9309786717).

18608940243 is an frugal number, since it uses more digits than its factorization.

18608940243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5855 (or 2920 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 18608940243 in words is "eighteen billion, six hundred eight million, nine hundred forty thousand, two hundred forty-three".