18873748756 has 18 divisors (see below), whose sum is σ = 34527547082. Its totient is φ = 9026574480.

The previous prime is 18873748753. The next prime is 18873748783. The reversal of 18873748756 is 65784737881.

It can be written as a sum of positive squares in only one way, i.e., 14814784656 + 4058964100 = 121716^2 + 63710^2 .

It is a super-2 number, since 2×18873748756² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873748753) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4457655 + ... + 4461886.

Almost surely, 2^18873748756 is an apocalyptic number.

It is an amenable number.

18873748756 is a deficient number, since it is larger than the sum of its proper divisors (15653798326).

18873748756 is a wasteful number, since it uses less digits than its factorization.

18873748756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8919591 (or 8919566 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 64.

The spelling of 18873748756 in words is "eighteen billion, eight hundred seventy-three million, seven hundred forty-eight thousand, seven hundred fifty-six".