20853010502501 has 2 divisors, whose sum is σ = 20853010502502. Its totient is φ = 20853010502500.

The previous prime is 20853010502417. The next prime is 20853010502573. The reversal of 20853010502501 is 10520501035802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16813493381476 + 4039517121025 = 4100426^2 + 2009855^2 .

It is a cyclic number.

It is not a de Polignac number, because 20853010502501 - 2¹⁴ = 20853010486117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20853010502201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426505251250 + 10426505251251.

It is an arithmetic number, because the mean of its divisors is an integer number (10426505251251).

Almost surely, 2^{20853010502501} is an apocalyptic number.

It is an amenable number.

20853010502501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853010502501 is an equidigital number, since it uses as much as digits as its factorization.

20853010502501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 20853010502501 in words is "twenty trillion, eight hundred fifty-three billion, ten million, five hundred two thousand, five hundred one".