20443253320 has 64 divisors (see below), whose sum is σ = 53989159680. Its totient is φ = 6819676416.

The previous prime is 20443253317. The next prime is 20443253351. The reversal of 20443253320 is 2335234402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 976284 + ... + 997003.

It is an arithmetic number, because the mean of its divisors is an integer number (843580620).

Almost surely, 2^20443253320 is an apocalyptic number.

20443253320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20443253320 is an abundant number, since it is smaller than the sum of its proper divisors (33545906360).

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

20443253320 is a wasteful number, since it uses less digits than its factorization.

20443253320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973342 (or 1973338 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 28.

Adding to 20443253320 its reverse (2335234402), we get a palindrome (22778487722).

It can be divided in two parts, 204432 and 53320, that added together give a palindrome (257752).

The spelling of 20443253320 in words is "twenty billion, four hundred forty-three million, two hundred fifty-three thousand, three hundred twenty".