18429670331 has 4 divisors (see below), whose sum is σ = 19399653000. Its totient is φ = 17459687664.

The previous prime is 18429670321. The next prime is 18429670333. The reversal of 18429670331 is 13307692481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18429670331 is a prime.

It is a super-2 number, since 2×18429670331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18429670333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484991306 + ... + 484991343.

It is an arithmetic number, because the mean of its divisors is an integer number (4849913250).

Almost surely, 2^18429670331 is an apocalyptic number.

18429670331 is a deficient number, since it is larger than the sum of its proper divisors (969982669).

18429670331 is an equidigital number, since it uses as much as digits as its factorization.

18429670331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969982668.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 18429670331 in words is "eighteen billion, four hundred twenty-nine million, six hundred seventy thousand, three hundred thirty-one".