22011420440 has 32 divisors (see below), whose sum is σ = 51678989280. Its totient is φ = 8421760512.

The previous prime is 22011420401. The next prime is 22011420461. The reversal of 22011420440 is 4402411022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11961809 + ... + 11963648.

It is an arithmetic number, because the mean of its divisors is an integer number (1614968415).

Almost surely, 2^22011420440 is an apocalyptic number.

22011420440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22011420440 is an abundant number, since it is smaller than the sum of its proper divisors (29667568840).

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

22011420440 is a wasteful number, since it uses less digits than its factorization.

22011420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23925491 (or 23925487 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22011420440 its reverse (4402411022), we get a palindrome (26413831462).

The spelling of 22011420440 in words is "twenty-two billion, eleven million, four hundred twenty thousand, four hundred forty".