18212029929 has 32 divisors (see below), whose sum is σ = 28417958400. Its totient is φ = 11495396880.

The previous prime is 18212029889. The next prime is 18212029931. The reversal of 18212029929 is 92992021281.

It is not a de Polignac number, because 18212029929 - 2¹¹ = 18212027881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18212029939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 919242 + ... + 938844.

It is an arithmetic number, because the mean of its divisors is an integer number (888061200).

Almost surely, 2^18212029929 is an apocalyptic number.

18212029929 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18212029929 is a deficient number, since it is larger than the sum of its proper divisors (10205928471).

18212029929 is a wasteful number, since it uses less digits than its factorization.

18212029929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21442 (or 21436 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 18212029929 in words is "eighteen billion, two hundred twelve million, twenty-nine thousand, nine hundred twenty-nine".