18037680377 has 4 divisors (see below), whose sum is σ = 18457161360. Its totient is φ = 17618199396.

The previous prime is 18037680373. The next prime is 18037680403. The reversal of 18037680377 is 77308673081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18037680377 - 2² = 18037680373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18037680373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209740427 + ... + 209740512.

It is an arithmetic number, because the mean of its divisors is an integer number (4614290340).

Almost surely, 2^18037680377 is an apocalyptic number.

It is an amenable number.

18037680377 is a deficient number, since it is larger than the sum of its proper divisors (419480983).

18037680377 is an equidigital number, since it uses as much as digits as its factorization.

18037680377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419480982.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 18037680377 in words is "eighteen billion, thirty-seven million, six hundred eighty thousand, three hundred seventy-seven".