16393129920 has 336 divisors, whose sum is σ = 61918522848. Its totient is φ = 4114022400.

The previous prime is 16393129873. The next prime is 16393129981. The reversal of 16393129920 is 2992139361.

16393129920 is a `hidden beast` number, since 1 + 639 + 3 + 1 + 2 + 9 + 9 + 2 + 0 = 666.

16393129920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1315720 + ... + 1328120.

It is an arithmetic number, because the mean of its divisors is an integer number (184281318).

Almost surely, 2^16393129920 is an apocalyptic number.

16393129920 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 16393129920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30959261424).

16393129920 is an abundant number, since it is smaller than the sum of its proper divisors (45525392928).

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

16393129920 is a wasteful number, since it uses less digits than its factorization.

16393129920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450 (or 12428 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 16393129920 in words is "sixteen billion, three hundred ninety-three million, one hundred twenty-nine thousand, nine hundred twenty".