20402211043 has 2 divisors, whose sum is σ = 20402211044. Its totient is φ = 20402211042.

The previous prime is 20402211017. The next prime is 20402211047. The reversal of 20402211043 is 34011220402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402211043 is a prime.

It is a super-2 number, since 2×20402211043² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20402211043.

It is not a weakly prime, because it can be changed into another prime (20402211047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201105521 + 10201105522.

It is an arithmetic number, because the mean of its divisors is an integer number (10201105522).

Almost surely, 2^20402211043 is an apocalyptic number.

20402211043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402211043 is an equidigital number, since it uses as much as digits as its factorization.

20402211043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20402211043 its reverse (34011220402), we get a palindrome (54413431445).

The spelling of 20402211043 in words is "twenty billion, four hundred two million, two hundred eleven thousand, forty-three".