20950246553 has 2 divisors, whose sum is σ = 20950246554. Its totient is φ = 20950246552.

The previous prime is 20950246487. The next prime is 20950246589. The reversal of 20950246553 is 35564205902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20435274304 + 514972249 = 142952^2 + 22693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20950246553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20950246553.

It is not a weakly prime, because it can be changed into another prime (20950243553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475123276 + 10475123277.

It is an arithmetic number, because the mean of its divisors is an integer number (10475123277).

Almost surely, 2^20950246553 is an apocalyptic number.

It is an amenable number.

20950246553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20950246553 is an equidigital number, since it uses as much as digits as its factorization.

20950246553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 20950246553 in words is "twenty billion, nine hundred fifty million, two hundred forty-six thousand, five hundred fifty-three".