20950010563 has 2 divisors, whose sum is σ = 20950010564. Its totient is φ = 20950010562.

The previous prime is 20950010561. The next prime is 20950010593. The reversal of 20950010563 is 36501005902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20950010563 - 2¹ = 20950010561 is a prime.

It is a super-4 number, since 4×20950010563⁴ (a number of 42 digits) contains 4444 as substring.

Together with 20950010561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20950010561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475005281 + 10475005282.

It is an arithmetic number, because the mean of its divisors is an integer number (10475005282).

Almost surely, 2^20950010563 is an apocalyptic number.

20950010563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20950010563 is an equidigital number, since it uses as much as digits as its factorization.

20950010563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The spelling of 20950010563 in words is "twenty billion, nine hundred fifty million, ten thousand, five hundred sixty-three".