220020406 has 8 divisors (see below), whose sum is σ = 330327864. Its totient is φ = 109911120.

The previous prime is 220020401. The next prime is 220020421. The reversal of 220020406 is 604020022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 220020406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020401) 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 3 ways as a sum of consecutive naturals, for example, 46735 + ... + 51226.

It is an arithmetic number, because the mean of its divisors is an integer number (41290983).

Almost surely, 2^220020406 is an apocalyptic number.

220020406 is a deficient number, since it is larger than the sum of its proper divisors (110307458).

220020406 is a wasteful number, since it uses less digits than its factorization.

220020406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99086.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 220020406 is about 14833.0848443606. The cubic root of 220020406 is about 603.6997378239.

Adding to 220020406 its reverse (604020022), we get a palindrome (824040428).

The spelling of 220020406 in words is "two hundred twenty million, twenty thousand, four hundred six".