20002000021943 has 2 divisors, whose sum is σ = 20002000021944. Its totient is φ = 20002000021942.

The previous prime is 20002000021933. The next prime is 20002000021951. The reversal of 20002000021943 is 34912000020002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20002000021943 - 2⁶ = 20002000021879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002000021933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001000010971 + 10001000010972.

It is an arithmetic number, because the mean of its divisors is an integer number (10001000010972).

Almost surely, 2^{20002000021943} is an apocalyptic number.

20002000021943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002000021943 is an equidigital number, since it uses as much as digits as its factorization.

20002000021943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20002000021943 its reverse (34912000020002), we get a palindrome (54914000041945).

The spelling of 20002000021943 in words is "twenty trillion, two billion, twenty-one thousand, nine hundred forty-three".