20011533503 has 16 divisors (see below), whose sum is σ = 22160609856. Its totient is φ = 17952994560.

The previous prime is 20011533497. The next prime is 20011533517. The reversal of 20011533503 is 30533511002.

It is a cyclic number.

It is not a de Polignac number, because 20011533503 - 2¹⁰ = 20011532479 is a prime.

It is a super-2 number, since 2×20011533503² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011533593) by changing a digit.

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, 68801 + ... + 211557.

It is an arithmetic number, because the mean of its divisors is an integer number (1385038116).

Almost surely, 2^20011533503 is an apocalyptic number.

20011533503 is a deficient number, since it is larger than the sum of its proper divisors (2149076353).

20011533503 is a wasteful number, since it uses less digits than its factorization.

20011533503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143074.

The product of its (nonzero) digits is 1350, while the sum is 23.

The spelling of 20011533503 in words is "twenty billion, eleven million, five hundred thirty-three thousand, five hundred three".