20311134503 has 8 divisors (see below), whose sum is σ = 22533154560. Its totient is φ = 18151706680.

The previous prime is 20311134491. The next prime is 20311134541. The reversal of 20311134503 is 30543111302.

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 20311134503 - 2⁶ = 20311134439 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 (20311134593) 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, 15647375 + ... + 15648672.

It is an arithmetic number, because the mean of its divisors is an integer number (2816644320).

Almost surely, 2^20311134503 is an apocalyptic number.

20311134503 is a deficient number, since it is larger than the sum of its proper divisors (2222020057).

20311134503 is a wasteful number, since it uses less digits than its factorization.

20311134503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31296117.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 20311134503 its reverse (30543111302), we get a palindrome (50854245805).

The spelling of 20311134503 in words is "twenty billion, three hundred eleven million, one hundred thirty-four thousand, five hundred three".