16543376920 has 128 divisors (see below), whose sum is σ = 44250624000. Its totient is φ = 5446771200.

The previous prime is 16543376897. The next prime is 16543376929. The reversal of 16543376920 is 2967334561.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16543376929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1129806 + ... + 1144354.

It is an arithmetic number, because the mean of its divisors is an integer number (345708000).

Almost surely, 2^16543376920 is an apocalyptic number.

16543376920 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 16543376920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22125312000).

16543376920 is an abundant number, since it is smaller than the sum of its proper divisors (27707247080).

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

16543376920 is a wasteful number, since it uses less digits than its factorization.

16543376920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14729 (or 14725 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 16543376920 in words is "sixteen billion, five hundred forty-three million, three hundred seventy-six thousand, nine hundred twenty".