20100203443 has 2 divisors, whose sum is σ = 20100203444. Its totient is φ = 20100203442.

The previous prime is 20100203437. The next prime is 20100203471. The reversal of 20100203443 is 34430200102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20100203443 - 2⁵ = 20100203411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20100203443.

It is not a weakly prime, because it can be changed into another prime (20100203423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050101721 + 10050101722.

It is an arithmetic number, because the mean of its divisors is an integer number (10050101722).

Almost surely, 2^20100203443 is an apocalyptic number.

20100203443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100203443 is an equidigital number, since it uses as much as digits as its factorization.

20100203443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20100203443 its reverse (34430200102), we get a palindrome (54530403545).

The spelling of 20100203443 in words is "twenty billion, one hundred million, two hundred three thousand, four hundred forty-three".