18783719328 has 48 divisors (see below), whose sum is σ = 53789744736. Its totient is φ = 5692035840.

The previous prime is 18783719323. The next prime is 18783719359. The reversal of 18783719328 is 82391738781.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18783719328² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18783719323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8892751 + ... + 8894862.

It is an arithmetic number, because the mean of its divisors is an integer number (1120619682).

Almost surely, 2^18783719328 is an apocalyptic number.

It is an amenable number.

18783719328 is an abundant number, since it is smaller than the sum of its proper divisors (35006025408).

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

18783719328 is a wasteful number, since it uses less digits than its factorization.

18783719328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17787637 (or 17787629 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 57.

The spelling of 18783719328 in words is "eighteen billion, seven hundred eighty-three million, seven hundred nineteen thousand, three hundred twenty-eight".