20122041640 has 32 divisors (see below), whose sum is σ = 45285859080. Its totient is φ = 8046813952.

The previous prime is 20122041547. The next prime is 20122041647. The reversal of 20122041640 is 4614022102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18783798916 + 1338242724 = 137054^2 + 36582^2 .

It is not an unprimeable number, because it can be changed into a prime (20122041647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105774 + ... + 226786.

Almost surely, 2^20122041640 is an apocalyptic number.

20122041640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122041640 is an abundant number, since it is smaller than the sum of its proper divisors (25163817440).

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

20122041640 is a wasteful number, since it uses less digits than its factorization.

20122041640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125181 (or 125177 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 20122041640 its reverse (4614022102), we get a palindrome (24736063742).

The spelling of 20122041640 in words is "twenty billion, one hundred twenty-two million, forty-one thousand, six hundred forty".