20023022400 has 336 divisors, whose sum is σ = 68289879168. Its totient is φ = 5132288000.

The previous prime is 20023022389. The next prime is 20023022407. The reversal of 20023022400 is 422032002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20023022400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023022407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13972084 + ... + 13973516.

It is an arithmetic number, because the mean of its divisors is an integer number (203243688).

Almost surely, 2^20023022400 is an apocalyptic number.

20023022400 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 20023022400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34144939584).

20023022400 is an abundant number, since it is smaller than the sum of its proper divisors (48266856768).

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

20023022400 is a wasteful number, since it uses less digits than its factorization.

20023022400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

Adding to 20023022400 its reverse (422032002), we get a palindrome (20445054402).

The spelling of 20023022400 in words is "twenty billion, twenty-three million, twenty-two thousand, four hundred".