20233313440 has 96 divisors (see below), whose sum is σ = 49976631936. Its totient is φ = 7726371840.

The previous prime is 20233313413. The next prime is 20233313449. The reversal of 20233313440 is 4431333202.

It is a super-2 number, since 2×20233313440² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20233313449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1985799 + ... + 1995961.

It is an arithmetic number, because the mean of its divisors is an integer number (520589916).

Almost surely, 2^20233313440 is an apocalyptic number.

20233313440 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 20233313440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24988315968).

20233313440 is an abundant number, since it is smaller than the sum of its proper divisors (29743318496).

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

20233313440 is a wasteful number, since it uses less digits than its factorization.

20233313440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10742 (or 10734 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 20233313440 its reverse (4431333202), we get a palindrome (24664646642).

The spelling of 20233313440 in words is "twenty billion, two hundred thirty-three million, three hundred thirteen thousand, four hundred forty".