18880840233 has 12 divisors (see below), whose sum is σ = 28282411248. Its totient is φ = 12587226660.

The previous prime is 18880840229. The next prime is 18880840241. The reversal of 18880840233 is 33204808881.

It is not a de Polignac number, because 18880840233 - 2² = 18880840229 is a prime.

It is a super-2 number, since 2×18880840233² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18880840213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38849223 + ... + 38849708.

It is an arithmetic number, because the mean of its divisors is an integer number (2356867604).

Almost surely, 2^18880840233 is an apocalyptic number.

It is an amenable number.

18880840233 is a deficient number, since it is larger than the sum of its proper divisors (9401571015).

18880840233 is an frugal number, since it uses more digits than its factorization.

18880840233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77698946 (or 77698934 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 18880840233 in words is "eighteen billion, eight hundred eighty million, eight hundred forty thousand, two hundred thirty-three".