18119863729 has 16 divisors (see below), whose sum is σ = 20940828480. Its totient is φ = 15495528960.

The previous prime is 18119863717. The next prime is 18119863771. The reversal of 18119863729 is 92736891181.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18119863729 - 2²³ = 18111475121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18119863729.

It is not an unprimeable number, because it can be changed into a prime (18119863789) 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, 348382 + ... + 397000.

It is an arithmetic number, because the mean of its divisors is an integer number (1308801780).

Almost surely, 2^18119863729 is an apocalyptic number.

It is an amenable number.

18119863729 is a deficient number, since it is larger than the sum of its proper divisors (2820964751).

18119863729 is a wasteful number, since it uses less digits than its factorization.

18119863729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50640.

The product of its digits is 1306368, while the sum is 55.

The spelling of 18119863729 in words is "eighteen billion, one hundred nineteen million, eight hundred sixty-three thousand, seven hundred twenty-nine".