20211002447 has 2 divisors, whose sum is σ = 20211002448. Its totient is φ = 20211002446.

The previous prime is 20211002429. The next prime is 20211002453. The reversal of 20211002447 is 74420011202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211002447 - 2⁸ = 20211002191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211002407) 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, 10105501223 + 10105501224.

It is an arithmetic number, because the mean of its divisors is an integer number (10105501224).

Almost surely, 2^20211002447 is an apocalyptic number.

20211002447 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211002447 is an equidigital number, since it uses as much as digits as its factorization.

20211002447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 20211002447 its reverse (74420011202), we get a palindrome (94631013649).

The spelling of 20211002447 in words is "twenty billion, two hundred eleven million, two thousand, four hundred forty-seven".