18363738128 has 20 divisors (see below), whose sum is σ = 35589855660. Its totient is φ = 9179259264.

The previous prime is 18363738077. The next prime is 18363738137. The reversal of 18363738128 is 82183736381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 778856464 + 17584881664 = 27908^2 + 132608^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104423 + ... + 218246.

It is an arithmetic number, because the mean of its divisors is an integer number (1779492783).

Almost surely, 2^18363738128 is an apocalyptic number.

It is an amenable number.

18363738128 is a deficient number, since it is larger than the sum of its proper divisors (17226117532).

18363738128 is a wasteful number, since it uses less digits than its factorization.

18363738128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326234 (or 326228 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The spelling of 18363738128 in words is "eighteen billion, three hundred sixty-three million, seven hundred thirty-eight thousand, one hundred twenty-eight".