20323323240 has 64 divisors (see below), whose sum is σ = 66512698560. Its totient is φ = 4926865920.

The previous prime is 20323323239. The next prime is 20323323247. The reversal of 20323323240 is 4232332302.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20323323240.

It is not an unprimeable number, because it can be changed into a prime (20323323247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7696909 + ... + 7699548.

It is an arithmetic number, because the mean of its divisors is an integer number (1039260915).

Almost surely, 2^20323323240 is an apocalyptic number.

20323323240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323323240 is an abundant number, since it is smaller than the sum of its proper divisors (46189375320).

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

20323323240 is a wasteful number, since it uses less digits than its factorization.

20323323240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15396482 (or 15396478 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 24.

Adding to 20323323240 its reverse (4232332302), we get a palindrome (24555655542).

The spelling of 20323323240 in words is "twenty billion, three hundred twenty-three million, three hundred twenty-three thousand, two hundred forty".