20013133503243 has 16 divisors (see below), whose sum is σ = 26703839949696. Its totient is φ = 13332261539520.

The previous prime is 20013133503229. The next prime is 20013133503257. The reversal of 20013133503243 is 34230533131002.

It is an interprime number because it is at equal distance from previous prime (20013133503229) and next prime (20013133503257).

It is not a de Polignac number, because 20013133503243 - 2¹⁸ = 20013133241099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20013133503243.

It is not an unprimeable number, because it can be changed into a prime (20013133507243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22517980 + ... + 23389862.

It is an arithmetic number, because the mean of its divisors is an integer number (1668989996856).

Almost surely, 2^{20013133503243} is an apocalyptic number.

20013133503243 is a deficient number, since it is larger than the sum of its proper divisors (6690706446453).

20013133503243 is a wasteful number, since it uses less digits than its factorization.

20013133503243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877514.

The product of its (nonzero) digits is 19440, while the sum is 30.

Adding to 20013133503243 its reverse (34230533131002), we get a palindrome (54243666634245).

The spelling of 20013133503243 in words is "twenty trillion, thirteen billion, one hundred thirty-three million, five hundred three thousand, two hundred forty-three".