20442244420 has 96 divisors (see below), whose sum is σ = 47898385920. Its totient is φ = 7276469760.

The previous prime is 20442244411. The next prime is 20442244429. The reversal of 20442244420 is 2444224402.

It is an interprime number because it is at equal distance from previous prime (20442244411) and next prime (20442244429).

It is a super-2 number, since 2×20442244420² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20442244429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6113269 + ... + 6116611.

It is an arithmetic number, because the mean of its divisors is an integer number (498941520).

Almost surely, 2^20442244420 is an apocalyptic number.

20442244420 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 20442244420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23949192960).

20442244420 is an abundant number, since it is smaller than the sum of its proper divisors (27456141500).

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

20442244420 is a wasteful number, since it uses less digits than its factorization.

20442244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205 (or 4203 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20442244420 its reverse (2444224402), we get a palindrome (22886468822).

It can be divided in two parts, 204422 and 44420, that added together give a palindrome (248842).

The spelling of 20442244420 in words is "twenty billion, four hundred forty-two million, two hundred forty-four thousand, four hundred twenty".