20535265601 has 2 divisors, whose sum is σ = 20535265602. Its totient is φ = 20535265600.

The previous prime is 20535265579. The next prime is 20535265627. The reversal of 20535265601 is 10656253502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20513400625 + 21864976 = 143225^2 + 4676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20535265601 - 2¹⁰ = 20535264577 is a prime.

It is a super-2 number, since 2×20535265601² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20535265691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267632800 + 10267632801.

It is an arithmetic number, because the mean of its divisors is an integer number (10267632801).

Almost surely, 2^20535265601 is an apocalyptic number.

It is an amenable number.

20535265601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535265601 is an equidigital number, since it uses as much as digits as its factorization.

20535265601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 20535265601 in words is "twenty billion, five hundred thirty-five million, two hundred sixty-five thousand, six hundred one".