20261363735533 has 2 divisors, whose sum is σ = 20261363735534. Its totient is φ = 20261363735532.

The previous prime is 20261363735519. The next prime is 20261363735603. The reversal of 20261363735533 is 33553736316202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14003776434244 + 6257587301289 = 3742162^2 + 2501517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20261363735533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20261361735533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10130681867766 + 10130681867767.

It is an arithmetic number, because the mean of its divisors is an integer number (10130681867767).

Almost surely, 2^{20261363735533} is an apocalyptic number.

It is an amenable number.

20261363735533 is a deficient number, since it is larger than the sum of its proper divisors (1).

20261363735533 is an equidigital number, since it uses as much as digits as its factorization.

20261363735533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6123600, while the sum is 49.

The spelling of 20261363735533 in words is "twenty trillion, two hundred sixty-one billion, three hundred sixty-three million, seven hundred thirty-five thousand, five hundred thirty-three".