18281929204 has 72 divisors (see below), whose sum is σ = 40936250880. Its totient is φ = 7122727920.

The previous prime is 18281929163. The next prime is 18281929249. The reversal of 18281929204 is 40292918281.

It is a happy number.

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, 225837 + ... + 295915.

It is an arithmetic number, because the mean of its divisors is an integer number (568559040).

Almost surely, 2^18281929204 is an apocalyptic number.

18281929204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18281929204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20468125440).

18281929204 is an abundant number, since it is smaller than the sum of its proper divisors (22654321676).

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

18281929204 is a wasteful number, since it uses less digits than its factorization.

18281929204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70130 (or 70099 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 18281929204 in words is "eighteen billion, two hundred eighty-one million, nine hundred twenty-nine thousand, two hundred four".