20450221120436 has 12 divisors (see below), whose sum is σ = 36142222475940. Its totient is φ = 10123871841600.

The previous prime is 20450221120409. The next prime is 20450221120471. The reversal of 20450221120436 is 63402112205402.

It can be written as a sum of positive squares in 2 ways, for example, as 19877384060836 + 572837059600 = 4458406^2 + 756860^2 .

It is a congruent 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, 25309679201 + ... + 25309680008.

It is an arithmetic number, because the mean of its divisors is an integer number (3011851872995).

Almost surely, 2^{20450221120436} is an apocalyptic number.

It is an amenable number.

20450221120436 is a deficient number, since it is larger than the sum of its proper divisors (15692001355504).

20450221120436 is a wasteful number, since it uses less digits than its factorization.

20450221120436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50619359314 (or 50619359312 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 20450221120436 its reverse (63402112205402), we get a palindrome (83852333325838).

The spelling of 20450221120436 in words is "twenty trillion, four hundred fifty billion, two hundred twenty-one million, one hundred twenty thousand, four hundred thirty-six".