20136530813263 has 4 divisors (see below), whose sum is σ = 20141959916680. Its totient is φ = 20131101709848.

The previous prime is 20136530813227. The next prime is 20136530813281. The reversal of 20136530813263 is 36231803563102.

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-20136530813263 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 (20136530613263) 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, 2714546145 + ... + 2714553562.

It is an arithmetic number, because the mean of its divisors is an integer number (5035489979170).

Almost surely, 2^{20136530813263} is an apocalyptic number.

20136530813263 is a deficient number, since it is larger than the sum of its proper divisors (5429103417).

20136530813263 is an equidigital number, since it uses as much as digits as its factorization.

20136530813263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429103416.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 20136530813263 in words is "twenty trillion, one hundred thirty-six billion, five hundred thirty million, eight hundred thirteen thousand, two hundred sixty-three".