20005401443 has 2 divisors, whose sum is σ = 20005401444. Its totient is φ = 20005401442.

The previous prime is 20005401431. The next prime is 20005401467. The reversal of 20005401443 is 34410450002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20005401443 - 2⁸ = 20005401187 is a prime.

It is not a weakly prime, because it can be changed into another prime (20005401413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002700721 + 10002700722.

It is an arithmetic number, because the mean of its divisors is an integer number (10002700722).

Almost surely, 2^20005401443 is an apocalyptic number.

20005401443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20005401443 is an equidigital number, since it uses as much as digits as its factorization.

20005401443 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 20005401443 its reverse (34410450002), we get a palindrome (54415851445).

The spelling of 20005401443 in words is "twenty billion, five million, four hundred one thousand, four hundred forty-three".