20503224305 has 16 divisors (see below), whose sum is σ = 26219856384. Its totient is φ = 15355602240.

The previous prime is 20503224293. The next prime is 20503224367. The reversal of 20503224305 is 50342230502.

It is not a de Polignac number, because 20503224305 - 2¹⁶ = 20503158769 is a prime.

It is a super-2 number, since 2×20503224305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1891286 + ... + 1902095.

It is an arithmetic number, because the mean of its divisors is an integer number (1638741024).

Almost surely, 2^20503224305 is an apocalyptic number.

It is an amenable number.

20503224305 is a deficient number, since it is larger than the sum of its proper divisors (5716632079).

20503224305 is a wasteful number, since it uses less digits than its factorization.

20503224305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793456.

The product of its (nonzero) digits is 7200, while the sum is 26.

Adding to 20503224305 its reverse (50342230502), we get a palindrome (70845454807).

The spelling of 20503224305 in words is "twenty billion, five hundred three million, two hundred twenty-four thousand, three hundred five".