16570216420 has 24 divisors (see below), whose sum is σ = 35646174648. Its totient is φ = 6466425600.

The previous prime is 16570216373. The next prime is 16570216427. The reversal of 16570216420 is 2461207561.

It can be written as a sum of positive squares in 4 ways, for example, as 1496761344 + 15073455076 = 38688^2 + 122774^2 .

It is not an unprimeable number, because it can be changed into a prime (16570216427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10102971 + ... + 10104610.

It is an arithmetic number, because the mean of its divisors is an integer number (1485257277).

Almost surely, 2^16570216420 is an apocalyptic number.

16570216420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16570216420 is an abundant number, since it is smaller than the sum of its proper divisors (19075958228).

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

16570216420 is a wasteful number, since it uses less digits than its factorization.

16570216420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20207631 (or 20207629 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 16570216420 in words is "sixteen billion, five hundred seventy million, two hundred sixteen thousand, four hundred twenty".