16206222420 has 120 divisors (see below), whose sum is σ = 51029886600. Its totient is φ = 4305477888.

The previous prime is 16206222419. The next prime is 16206222437. The reversal of 16206222420 is 2422260261.

It is a happy number.

16206222420 is a `hidden beast` number, since 16 + 2 + 0 + 6 + 222 + 420 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1233273924 + 14972948496 = 35118^2 + 122364^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 417186 + ... + 454374.

It is an arithmetic number, because the mean of its divisors is an integer number (425249055).

Almost surely, 2^16206222420 is an apocalyptic number.

16206222420 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 16206222420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25514943300).

16206222420 is an abundant number, since it is smaller than the sum of its proper divisors (34823664180).

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

16206222420 is a wasteful number, since it uses less digits than its factorization.

16206222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37479 (or 37468 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 16206222420 its reverse (2422260261), we get a palindrome (18628482681).

The spelling of 16206222420 in words is "sixteen billion, two hundred six million, two hundred twenty-two thousand, four hundred twenty".