20045134220 has 12 divisors (see below), whose sum is σ = 42094781904. Its totient is φ = 8018053680.

The previous prime is 20045134211. The next prime is 20045134237. The reversal of 20045134220 is 2243154002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501128336 + ... + 501128375.

It is an arithmetic number, because the mean of its divisors is an integer number (3507898492).

Almost surely, 2^20045134220 is an apocalyptic number.

20045134220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045134220 is an abundant number, since it is smaller than the sum of its proper divisors (22049647684).

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

20045134220 is a wasteful number, since it uses less digits than its factorization.

20045134220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002256720 (or 1002256718 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20045134220 its reverse (2243154002), we get a palindrome (22288288222).

The spelling of 20045134220 in words is "twenty billion, forty-five million, one hundred thirty-four thousand, two hundred twenty".