20443312215 has 12 divisors (see below), whose sum is σ = 35435074584. Its totient is φ = 10903099824.

The previous prime is 20443312199. The next prime is 20443312217. The reversal of 20443312215 is 51221334402.

20443312215 is a `hidden beast` number, since 2 + 0 + 4 + 433 + 1 + 221 + 5 = 666.

It is not a de Polignac number, because 20443312215 - 2⁴ = 20443312199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443312217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227147869 + ... + 227147958.

It is an arithmetic number, because the mean of its divisors is an integer number (2952922882).

Almost surely, 2^20443312215 is an apocalyptic number.

20443312215 is a deficient number, since it is larger than the sum of its proper divisors (14991762369).

20443312215 is a wasteful number, since it uses less digits than its factorization.

20443312215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454295838 (or 454295835 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20443312215 its reverse (51221334402), we get a palindrome (71664646617).

The spelling of 20443312215 in words is "twenty billion, four hundred forty-three million, three hundred twelve thousand, two hundred fifteen".