20136537335501 has 2 divisors, whose sum is σ = 20136537335502. Its totient is φ = 20136537335500.

The previous prime is 20136537335449. The next prime is 20136537335503. The reversal of 20136537335501 is 10553373563102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17930566802500 + 2205970533001 = 4234450^2 + 1485251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20136537335501 is a prime.

Together with 20136537335503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20136537335503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10068268667750 + 10068268667751.

It is an arithmetic number, because the mean of its divisors is an integer number (10068268667751).

Almost surely, 2^{20136537335501} is an apocalyptic number.

It is an amenable number.

20136537335501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20136537335501 is an equidigital number, since it uses as much as digits as its factorization.

20136537335501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 850500, while the sum is 44.

The spelling of 20136537335501 in words is "twenty trillion, one hundred thirty-six billion, five hundred thirty-seven million, three hundred thirty-five thousand, five hundred one".