22200020406 has 40 divisors (see below), whose sum is σ = 49924174080. Its totient is φ = 7373277072.

The previous prime is 22200020327. The next prime is 22200020407. The reversal of 22200020406 is 60402000222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200020407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 202486 + ... + 292233.

It is an arithmetic number, because the mean of its divisors is an integer number (1248104352).

Almost surely, 2^22200020406 is an apocalyptic number.

22200020406 is an abundant number, since it is smaller than the sum of its proper divisors (27724153674).

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

22200020406 is a wasteful number, since it uses less digits than its factorization.

22200020406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495010 (or 495001 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 22200020406 its reverse (60402000222), we get a palindrome (82602020628).

The spelling of 22200020406 in words is "twenty-two billion, two hundred million, twenty thousand, four hundred six".