20005220505294 has 24 divisors (see below), whose sum is σ = 45894329395200. Its totient is φ = 6276147609408.

The previous prime is 20005220505269. The next prime is 20005220505299. The reversal of 20005220505294 is 49250502250002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005220505299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32688268494 + ... + 32688269105.

It is an arithmetic number, because the mean of its divisors is an integer number (1912263724800).

Almost surely, 2^{20005220505294} is an apocalyptic number.

20005220505294 is an abundant number, since it is smaller than the sum of its proper divisors (25889108889906).

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

20005220505294 is a wasteful number, since it uses less digits than its factorization.

20005220505294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65376537624 (or 65376537621 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 20005220505294 its reverse (49250502250002), we get a palindrome (69255722755296).

The spelling of 20005220505294 in words is "twenty trillion, five billion, two hundred twenty million, five hundred five thousand, two hundred ninety-four".