20001203400043 has 16 divisors (see below), whose sum is σ = 20730961611360. Its totient is φ = 19274128473600.

The previous prime is 20001203400037. The next prime is 20001203400047. The reversal of 20001203400043 is 34000430210002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001203400043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001203400047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91909683 + ... + 92127043.

It is an arithmetic number, because the mean of its divisors is an integer number (1295685100710).

Almost surely, 2^{20001203400043} is an apocalyptic number.

20001203400043 is a deficient number, since it is larger than the sum of its proper divisors (729758211317).

20001203400043 is a wasteful number, since it uses less digits than its factorization.

20001203400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223518.

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

Adding to 20001203400043 its reverse (34000430210002), we get a palindrome (54001633610045).

The spelling of 20001203400043 in words is "twenty trillion, one billion, two hundred three million, four hundred thousand, forty-three".