20503111222 has 32 divisors (see below), whose sum is σ = 35590122144. Its totient is φ = 8755084800.

The previous prime is 20503111219. The next prime is 20503111243. The reversal of 20503111222 is 22211130502.

It is a self number, because there is not a number n which added to its sum of digits gives 20503111222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151668 + ... + 253000.

It is an arithmetic number, because the mean of its divisors is an integer number (1112191317).

Almost surely, 2^20503111222 is an apocalyptic number.

20503111222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20503111222 is a deficient number, since it is larger than the sum of its proper divisors (15087010922).

20503111222 is a wasteful number, since it uses less digits than its factorization.

20503111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101904.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20503111222 its reverse (22211130502), we get a palindrome (42714241724).

The spelling of 20503111222 in words is "twenty billion, five hundred three million, one hundred eleven thousand, two hundred twenty-two".