20204422440 has 128 divisors (see below), whose sum is σ = 61924072320. Its totient is φ = 5272243200.

The previous prime is 20204422421. The next prime is 20204422541. The reversal of 20204422440 is 4422440202.

It is a super-2 number, since 2×20204422440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20204422440.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1435035 + ... + 1449045.

It is an arithmetic number, because the mean of its divisors is an integer number (483781815).

Almost surely, 2^20204422440 is an apocalyptic number.

20204422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20204422440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30962036160).

20204422440 is an abundant number, since it is smaller than the sum of its proper divisors (41719649880).

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

20204422440 is a wasteful number, since it uses less digits than its factorization.

20204422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14283 (or 14279 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20204422440 its reverse (4422440202), we get a palindrome (24626862642).

The spelling of 20204422440 in words is "twenty billion, two hundred four million, four hundred twenty-two thousand, four hundred forty".