20322141640 has 64 divisors (see below), whose sum is σ = 46484928000. Its totient is φ = 7994614272.

The previous prime is 20322141629. The next prime is 20322141659. The reversal of 20322141640 is 4614122302.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726636 + ... + 754084.

It is an arithmetic number, because the mean of its divisors is an integer number (726327000).

Almost surely, 2^20322141640 is an apocalyptic number.

20322141640 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 20322141640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23242464000).

20322141640 is an abundant number, since it is smaller than the sum of its proper divisors (26162786360).

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

20322141640 is a wasteful number, since it uses less digits than its factorization.

20322141640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27766 (or 27762 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20322141640 its reverse (4614122302), we get a palindrome (24936263942).

The spelling of 20322141640 in words is "twenty billion, three hundred twenty-two million, one hundred forty-one thousand, six hundred forty".