20422220440 has 32 divisors (see below), whose sum is σ = 45954090000. Its totient is φ = 8168160384.

The previous prime is 20422220383. The next prime is 20422220449. The reversal of 20422220440 is 4402222402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422220449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793291 + ... + 818629.

Almost surely, 2^20422220440 is an apocalyptic number.

20422220440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422220440 is an abundant number, since it is smaller than the sum of its proper divisors (25531869560).

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

20422220440 is a wasteful number, since it uses less digits than its factorization.

20422220440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45499 (or 45495 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20422220440 its reverse (4402222402), we get a palindrome (24824442842).

The spelling of 20422220440 in words is "twenty billion, four hundred twenty-two million, two hundred twenty thousand, four hundred forty".