20331400 has 48 divisors (see below), whose sum is σ = 48099600. Its totient is φ = 7990080.

The previous prime is 20331373. The next prime is 20331403. The reversal of 20331400 is 413302.

It is not an unprimeable number, because it can be changed into a prime (20331403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10939 + ... + 12661.

It is an arithmetic number, because the mean of its divisors is an integer number (1002075).

Almost surely, 2^20331400 is an apocalyptic number.

20331400 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 20331400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24049800).

20331400 is an abundant number, since it is smaller than the sum of its proper divisors (27768200).

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

20331400 is a wasteful number, since it uses less digits than its factorization.

20331400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20331400 is about 4509.0353735583. The cubic root of 20331400 is about 272.9328194572.

Adding to 20331400 its reverse (413302), we get a palindrome (20744702).

The spelling of 20331400 in words is "twenty million, three hundred thirty-one thousand, four hundred".