22404023121340 has 144 divisors (see below), whose sum is σ = 57952419954912. Its totient is φ = 7229135499264.

The previous prime is 22404023121247. The next prime is 22404023121419. The reversal of 22404023121340 is 4312132040422.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 22404023121299 and 22404023121308.

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, 532482544 + ... + 532524616.

It is an arithmetic number, because the mean of its divisors is an integer number (402447360798).

Almost surely, 2^{22404023121340} is an apocalyptic number.

22404023121340 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 22404023121340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28976209977456).

22404023121340 is an abundant number, since it is smaller than the sum of its proper divisors (35548396833572).

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

22404023121340 is a wasteful number, since it uses less digits than its factorization.

22404023121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74076 (or 74067 counting only the distinct ones).

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

Adding to 22404023121340 its reverse (4312132040422), we get a palindrome (26716155161762).

The spelling of 22404023121340 in words is "twenty-two trillion, four hundred four billion, twenty-three million, one hundred twenty-one thousand, three hundred forty".