18773971707 has 8 divisors (see below), whose sum is σ = 25033498384. Its totient is φ = 12515213088.

The previous prime is 18773971703. The next prime is 18773971739. The reversal of 18773971707 is 70717937781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18773971707 - 2² = 18773971703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18773971703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132328 + ... + 234645.

It is an arithmetic number, because the mean of its divisors is an integer number (3129187298).

Almost surely, 2^18773971707 is an apocalyptic number.

18773971707 is a deficient number, since it is larger than the sum of its proper divisors (6259526677).

18773971707 is a wasteful number, since it uses less digits than its factorization.

18773971707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384029.

The product of its (nonzero) digits is 3630312, while the sum is 57.

The spelling of 18773971707 in words is "eighteen billion, seven hundred seventy-three million, nine hundred seventy-one thousand, seven hundred seven".