16613963920 has 80 divisors (see below), whose sum is σ = 40354417152. Its totient is φ = 6353648640.

The previous prime is 16613963897. The next prime is 16613963921. The reversal of 16613963920 is 2936931661.

16613963920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (16613963921) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 165484 + ... + 246196.

Almost surely, 2^16613963920 is an apocalyptic number.

16613963920 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 16613963920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20177208576).

16613963920 is an abundant number, since it is smaller than the sum of its proper divisors (23740453232).

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

16613963920 is a wasteful number, since it uses less digits than its factorization.

16613963920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80840 (or 80834 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 16613963920 in words is "sixteen billion, six hundred thirteen million, nine hundred sixty-three thousand, nine hundred twenty".