20122310400 has 216 divisors, whose sum is σ = 66735978624. Its totient is φ = 5339443200.

The previous prime is 20122310381. The next prime is 20122310407. The reversal of 20122310400 is 401322102.

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 20122310400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122310407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4048717 + ... + 4053683.

It is an arithmetic number, because the mean of its divisors is an integer number (308962864).

Almost surely, 2^20122310400 is an apocalyptic number.

20122310400 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 20122310400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33367989312).

20122310400 is an abundant number, since it is smaller than the sum of its proper divisors (46613668224).

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

20122310400 is a wasteful number, since it uses less digits than its factorization.

20122310400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207 (or 5188 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20122310400 its reverse (401322102), we get a palindrome (20523632502).

The spelling of 20122310400 in words is "twenty billion, one hundred twenty-two million, three hundred ten thousand, four hundred".