18856738268 has 6 divisors (see below), whose sum is σ = 32999291976. Its totient is φ = 9428369132.

The previous prime is 18856738267. The next prime is 18856738337. The reversal of 18856738268 is 86283765881.

It is a self number, because there is not a number n which added to its sum of digits gives 18856738268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18856738267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2357092280 + ... + 2357092287.

It is an arithmetic number, because the mean of its divisors is an integer number (5499881996).

Almost surely, 2^18856738268 is an apocalyptic number.

It is an amenable number.

18856738268 is a deficient number, since it is larger than the sum of its proper divisors (14142553708).

18856738268 is a wasteful number, since it uses less digits than its factorization.

18856738268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4714184571 (or 4714184569 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 62.

The spelling of 18856738268 in words is "eighteen billion, eight hundred fifty-six million, seven hundred thirty-eight thousand, two hundred sixty-eight".