16820705004 has 12 divisors (see below), whose sum is σ = 39248311704. Its totient is φ = 5606901664.

The previous prime is 16820705003. The next prime is 16820705009. The reversal of 16820705004 is 40050702861.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16820705004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16820705003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700862697 + ... + 700862720.

It is an arithmetic number, because the mean of its divisors is an integer number (3270692642).

Almost surely, 2^16820705004 is an apocalyptic number.

It is an amenable number.

16820705004 is an abundant number, since it is smaller than the sum of its proper divisors (22427606700).

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

16820705004 is a wasteful number, since it uses less digits than its factorization.

16820705004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401725424 (or 1401725422 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The spelling of 16820705004 in words is "sixteen billion, eight hundred twenty million, seven hundred five thousand, four".