20323626263503 has 4 divisors (see below), whose sum is σ = 20323645065088. Its totient is φ = 20323607461920.

The previous prime is 20323626263461. The next prime is 20323626263519. The reversal of 20323626263503 is 30536262632302.

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-20323626263503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20323626263503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323626363503) 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, 7673583 + ... + 9976528.

It is an arithmetic number, because the mean of its divisors is an integer number (5080911266272).

Almost surely, 2^{20323626263503} is an apocalyptic number.

20323626263503 is a deficient number, since it is larger than the sum of its proper divisors (18801585).

20323626263503 is a wasteful number, since it uses less digits than its factorization.

20323626263503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18801584.

The product of its (nonzero) digits is 1399680, while the sum is 43.

Adding to 20323626263503 its reverse (30536262632302), we get a palindrome (50859888895805).

The spelling of 20323626263503 in words is "twenty trillion, three hundred twenty-three billion, six hundred twenty-six million, two hundred sixty-three thousand, five hundred three".