20320283400 has 192 divisors, whose sum is σ = 67397620800. Its totient is φ = 5049216000.

The previous prime is 20320283393. The next prime is 20320283411. The reversal of 20320283400 is 438202302.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 680790 + ... + 710010.

It is an arithmetic number, because the mean of its divisors is an integer number (351029275).

Almost surely, 2^20320283400 is an apocalyptic number.

20320283400 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 20320283400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33698810400).

20320283400 is an abundant number, since it is smaller than the sum of its proper divisors (47077337400).

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

20320283400 is a wasteful number, since it uses less digits than its factorization.

20320283400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29320 (or 29311 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20320283400 its reverse (438202302), we get a palindrome (20758485702).

The spelling of 20320283400 in words is "twenty billion, three hundred twenty million, two hundred eighty-three thousand, four hundred".