20503033111 has 8 divisors (see below), whose sum is σ = 22368937104. Its totient is φ = 18637461120.

The previous prime is 20503033099. The next prime is 20503033121. The reversal of 20503033111 is 11133030502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20503033111 - 2²³ = 20494644503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503033121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56305 + ... + 210181.

It is an arithmetic number, because the mean of its divisors is an integer number (2796117138).

Almost surely, 2^20503033111 is an apocalyptic number.

20503033111 is a deficient number, since it is larger than the sum of its proper divisors (1865903993).

20503033111 is a wasteful number, since it uses less digits than its factorization.

20503033111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166001.

The product of its (nonzero) digits is 270, while the sum is 19.

Adding to 20503033111 its reverse (11133030502), we get a palindrome (31636063613).

The spelling of 20503033111 in words is "twenty billion, five hundred three million, thirty-three thousand, one hundred eleven".