18403234929 has 12 divisors (see below), whose sum is σ = 26595578100. Its totient is φ = 12262764384.

The previous prime is 18403234921. The next prime is 18403234931. The reversal of 18403234929 is 92943230481.

18403234929 is a `hidden beast` number, since 1 + 8 + 403 + 234 + 9 + 2 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12281737329 + 6121497600 = 110823^2 + 78240^2 .

It is not a de Polignac number, because 18403234929 - 2³ = 18403234921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18403234921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 485634 + ... + 522155.

It is an arithmetic number, because the mean of its divisors is an integer number (2216298175).

Almost surely, 2^18403234929 is an apocalyptic number.

It is an amenable number.

18403234929 is a deficient number, since it is larger than the sum of its proper divisors (8192343171).

18403234929 is a wasteful number, since it uses less digits than its factorization.

18403234929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009824 (or 1009821 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 18403234929 in words is "eighteen billion, four hundred three million, two hundred thirty-four thousand, nine hundred twenty-nine".