20232221123440 has 240 divisors, whose sum is σ = 52977937177152. Its totient is φ = 7155409895424.

The previous prime is 20232221123419. The next prime is 20232221123453. The reversal of 20232221123440 is 4432112223202.

It is a junction number, because it is equal to n+sod(n) for n = 20232221123399 and 20232221123408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42080077 + ... + 42558163.

Almost surely, 2^{20232221123440} is an apocalyptic number.

20232221123440 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 20232221123440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26488968588576).

20232221123440 is an abundant number, since it is smaller than the sum of its proper divisors (32745716053712).

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

20232221123440 is a wasteful number, since it uses less digits than its factorization.

20232221123440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478212 (or 478177 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20232221123440 its reverse (4432112223202), we get a palindrome (24664333346642).

The spelling of 20232221123440 in words is "twenty trillion, two hundred thirty-two billion, two hundred twenty-one million, one hundred twenty-three thousand, four hundred forty".