20212004543 has 2 divisors, whose sum is σ = 20212004544. Its totient is φ = 20212004542.

The previous prime is 20212004539. The next prime is 20212004551. The reversal of 20212004543 is 34540021202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212004543 - 2² = 20212004539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212006543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106002271 + 10106002272.

It is an arithmetic number, because the mean of its divisors is an integer number (10106002272).

Almost surely, 2^20212004543 is an apocalyptic number.

20212004543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212004543 is an equidigital number, since it uses as much as digits as its factorization.

20212004543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 20212004543 its reverse (34540021202), we get a palindrome (54752025745).

The spelling of 20212004543 in words is "twenty billion, two hundred twelve million, four thousand, five hundred forty-three".