18982273785 has 16 divisors (see below), whose sum is σ = 31418936640. Its totient is φ = 9774779840.

The previous prime is 18982273781. The next prime is 18982273787. The reversal of 18982273785 is 58737228981.

It is not a de Polignac number, because 18982273785 - 2² = 18982273781 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18982273781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21818271 + ... + 21819140.

It is an arithmetic number, because the mean of its divisors is an integer number (1963683540).

Almost surely, 2^18982273785 is an apocalyptic number.

18982273785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18982273785 is a deficient number, since it is larger than the sum of its proper divisors (12436662855).

18982273785 is a wasteful number, since it uses less digits than its factorization.

18982273785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43637448.

The product of its digits is 13547520, while the sum is 60.

The spelling of 18982273785 in words is "eighteen billion, nine hundred eighty-two million, two hundred seventy-three thousand, seven hundred eighty-five".