22220407646 has 32 divisors (see below), whose sum is σ = 34482792960. Its totient is φ = 10730861856.

The previous prime is 22220407621. The next prime is 22220407667. The reversal of 22220407646 is 64670402222.

It is a super-2 number, since 2×22220407646² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5972975 + ... + 5976693.

It is an arithmetic number, because the mean of its divisors is an integer number (1077587280).

Almost surely, 2^22220407646 is an apocalyptic number.

22220407646 is a deficient number, since it is larger than the sum of its proper divisors (12262385314).

22220407646 is a wasteful number, since it uses less digits than its factorization.

22220407646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328.

The product of its (nonzero) digits is 64512, while the sum is 35.

Adding to 22220407646 its reverse (64670402222), we get a palindrome (86890809868).

The spelling of 22220407646 in words is "twenty-two billion, two hundred twenty million, four hundred seven thousand, six hundred forty-six".