20211124440 has 128 divisors (see below), whose sum is σ = 65897092800. Its totient is φ = 4929361920.

The previous prime is 20211124433. The next prime is 20211124481. The reversal of 20211124440 is 4442111202.

It is a super-2 number, since 2×20211124440² (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 31 ways as a sum of consecutive naturals, for example, 110610 + ... + 229470.

Almost surely, 2^20211124440 is an apocalyptic number.

20211124440 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 20211124440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32948546400).

20211124440 is an abundant number, since it is smaller than the sum of its proper divisors (45685968360).

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

20211124440 is a wasteful number, since it uses less digits than its factorization.

20211124440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118997 (or 118993 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 20211124440 its reverse (4442111202), we get a palindrome (24653235642).

The spelling of 20211124440 in words is "twenty billion, two hundred eleven million, one hundred twenty-four thousand, four hundred forty".