18966817268 has 24 divisors (see below), whose sum is σ = 37940563584. Its totient is φ = 8127151200.

The previous prime is 18966817253. The next prime is 18966817277. The reversal of 18966817268 is 86271866981.

It is a self number, because there is not a number n which added to its sum of digits gives 18966817268.

It is a congruent number.

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, 101753 + ... + 219743.

It is an arithmetic number, because the mean of its divisors is an integer number (1580856816).

Almost surely, 2^18966817268 is an apocalyptic number.

It is an amenable number.

18966817268 is an abundant number, since it is smaller than the sum of its proper divisors (18973746316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18966817268 is a wasteful number, since it uses less digits than its factorization.

18966817268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123743 (or 123741 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 62.

The spelling of 18966817268 in words is "eighteen billion, nine hundred sixty-six million, eight hundred seventeen thousand, two hundred sixty-eight".