18429534720 has 800 divisors, whose sum is σ = 70728615936. Its totient is φ = 4578508800.

The previous prime is 18429534719. The next prime is 18429534779. The reversal of 18429534720 is 2743592481.

18429534720 is a `hidden beast` number, since 1 + 8 + 42 + 9 + 534 + 72 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 302123490 + ... + 302123550.

Almost surely, 2^18429534720 is an apocalyptic number.

18429534720 is a gapful number since it is divisible by the number (10) 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 18429534720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35364307968).

18429534720 is an abundant number, since it is smaller than the sum of its proper divisors (52299081216).

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

18429534720 is an equidigital number, since it uses as much as digits as its factorization.

18429534720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 18429534720 in words is "eighteen billion, four hundred twenty-nine million, five hundred thirty-four thousand, seven hundred twenty".