20503812263 has 4 divisors (see below), whose sum is σ = 22367795208. Its totient is φ = 18639829320.

The previous prime is 20503812239. The next prime is 20503812271. The reversal of 20503812263 is 36221830502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20503812263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503814263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931991456 + ... + 931991477.

It is an arithmetic number, because the mean of its divisors is an integer number (5591948802).

Almost surely, 2^20503812263 is an apocalyptic number.

20503812263 is a deficient number, since it is larger than the sum of its proper divisors (1863982945).

20503812263 is a wasteful number, since it uses less digits than its factorization.

20503812263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863982944.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 20503812263 in words is "twenty billion, five hundred three million, eight hundred twelve thousand, two hundred sixty-three".