18429389897 has 8 divisors (see below), whose sum is σ = 18482767200. Its totient is φ = 18376053984.

The previous prime is 18429389863. The next prime is 18429389917. The reversal of 18429389897 is 79898392481.

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

It is a cyclic number.

It is not a de Polignac number, because 18429389897 - 2¹² = 18429385801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18429389827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029578 + ... + 1047324.

It is an arithmetic number, because the mean of its divisors is an integer number (2310345900).

Almost surely, 2^18429389897 is an apocalyptic number.

It is an amenable number.

18429389897 is a deficient number, since it is larger than the sum of its proper divisors (53377303).

18429389897 is a wasteful number, since it uses less digits than its factorization.

18429389897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20695.

The product of its digits is 62705664, while the sum is 68.

The spelling of 18429389897 in words is "eighteen billion, four hundred twenty-nine million, three hundred eighty-nine thousand, eight hundred ninety-seven".