18729004392 has 192 divisors, whose sum is σ = 60664181760. Its totient is φ = 5107276800.

The previous prime is 18729004337. The next prime is 18729004417. The reversal of 18729004392 is 29340092781.

It is a super-3 number, since 3×18729004392³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1132342 + ... + 1148762.

It is an arithmetic number, because the mean of its divisors is an integer number (315959280).

Almost surely, 2^18729004392 is an apocalyptic number.

18729004392 is a gapful number since it is divisible by the number (12) 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 18729004392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30332090880).

18729004392 is an abundant number, since it is smaller than the sum of its proper divisors (41935177368).

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

18729004392 is a wasteful number, since it uses less digits than its factorization.

18729004392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544 (or 16537 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 18729004392 in words is "eighteen billion, seven hundred twenty-nine million, four thousand, three hundred ninety-two".