18011938377 has 16 divisors (see below), whose sum is σ = 24103654848. Its totient is φ = 11964126720.

The previous prime is 18011938361. The next prime is 18011938381. The reversal of 18011938377 is 77383911081.

It is not a de Polignac number, because 18011938377 - 2⁴ = 18011938361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18011938327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3980038 + ... + 3984560.

It is an arithmetic number, because the mean of its divisors is an integer number (1506478428).

Almost surely, 2^18011938377 is an apocalyptic number.

It is an amenable number.

18011938377 is a deficient number, since it is larger than the sum of its proper divisors (6091716471).

18011938377 is a wasteful number, since it uses less digits than its factorization.

18011938377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9080.

The product of its (nonzero) digits is 254016, while the sum is 48.

The spelling of 18011938377 in words is "eighteen billion, eleven million, nine hundred thirty-eight thousand, three hundred seventy-seven".