18943140268 has 24 divisors (see below), whose sum is σ = 36665416592. Its totient is φ = 8506689984.

The previous prime is 18943140259. The next prime is 18943140283. The reversal of 18943140268 is 86204134981.

It is a super-2 number, since 2×18943140268² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4920930 + ... + 4924777.

Almost surely, 2^18943140268 is an apocalyptic number.

It is an amenable number.

18943140268 is a deficient number, since it is larger than the sum of its proper divisors (17722276324).

18943140268 is a wasteful number, since it uses less digits than its factorization.

18943140268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9845761 (or 9845759 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 18943140268 in words is "eighteen billion, nine hundred forty-three million, one hundred forty thousand, two hundred sixty-eight".