18429639272 has 32 divisors (see below), whose sum is σ = 39335993280. Its totient is φ = 8012885760.

The previous prime is 18429639211. The next prime is 18429639299. The reversal of 18429639272 is 27293692481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4550753 + ... + 4554800.

It is an arithmetic number, because the mean of its divisors is an integer number (1229249790).

Almost surely, 2^18429639272 is an apocalyptic number.

It is an amenable number.

18429639272 is an abundant number, since it is smaller than the sum of its proper divisors (20906354008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18429639272 is a wasteful number, since it uses less digits than its factorization.

18429639272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105593 (or 9105589 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The spelling of 18429639272 in words is "eighteen billion, four hundred twenty-nine million, six hundred thirty-nine thousand, two hundred seventy-two".