18209064832 has 192 divisors, whose sum is σ = 43652442240. Its totient is φ = 7539194880.

The previous prime is 18209064779. The next prime is 18209064851. The reversal of 18209064832 is 23846090281.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28857157 + ... + 28857787.

It is an arithmetic number, because the mean of its divisors is an integer number (227356470).

Almost surely, 2^18209064832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18209064832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21826221120).

18209064832 is an abundant number, since it is smaller than the sum of its proper divisors (25443377408).

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

18209064832 is a wasteful number, since it uses less digits than its factorization.

18209064832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 18209064832 in words is "eighteen billion, two hundred nine million, sixty-four thousand, eight hundred thirty-two".