18119920485 has 16 divisors (see below), whose sum is σ = 29341174464. Its totient is φ = 9547523712.

The previous prime is 18119920459. The next prime is 18119920487. The reversal of 18119920485 is 58402991181.

It is a happy number.

It is not a de Polignac number, because 18119920485 - 2¹¹ = 18119918437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119920487) 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, 7275832 + ... + 7278321.

It is an arithmetic number, because the mean of its divisors is an integer number (1833823404).

Almost surely, 2^18119920485 is an apocalyptic number.

18119920485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18119920485 is a deficient number, since it is larger than the sum of its proper divisors (11221253979).

18119920485 is a wasteful number, since it uses less digits than its factorization.

18119920485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14554244.

The product of its (nonzero) digits is 207360, while the sum is 48.

The spelling of 18119920485 in words is "eighteen billion, one hundred nineteen million, nine hundred twenty thousand, four hundred eighty-five".