18429608238 has 32 divisors (see below), whose sum is σ = 36957803904. Its totient is φ = 6126792672.

The previous prime is 18429608233. The next prime is 18429608311. The reversal of 18429608238 is 83280692481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18429608231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7439056 + ... + 7441532.

It is an arithmetic number, because the mean of its divisors is an integer number (1154931372).

Almost surely, 2^18429608238 is an apocalyptic number.

18429608238 is an abundant number, since it is smaller than the sum of its proper divisors (18528195666).

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

18429608238 is a wasteful number, since it uses less digits than its factorization.

18429608238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5296.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 18429608238 in words is "eighteen billion, four hundred twenty-nine million, six hundred eight thousand, two hundred thirty-eight".