20222400352 has 144 divisors (see below), whose sum is σ = 51018170112. Its totient is φ = 7801678080.

The previous prime is 20222400311. The next prime is 20222400361. The reversal of 20222400352 is 25300422202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1770853 + ... + 1782235.

It is an arithmetic number, because the mean of its divisors is an integer number (354292848).

Almost surely, 2^20222400352 is an apocalyptic number.

20222400352 is a gapful number since it is divisible by the number (22) 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 20222400352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25509085056).

20222400352 is an abundant number, since it is smaller than the sum of its proper divisors (30795769760).

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

20222400352 is a wasteful number, since it uses less digits than its factorization.

20222400352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11521 (or 11506 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 20222400352 its reverse (25300422202), we get a palindrome (45522822554).

The spelling of 20222400352 in words is "twenty billion, two hundred twenty-two million, four hundred thousand, three hundred fifty-two".