20010234404021 has 2 divisors, whose sum is σ = 20010234404022. Its totient is φ = 20010234404020.

The previous prime is 20010234403993. The next prime is 20010234404047. The reversal of 20010234404021 is 12040443201002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15000632494225 + 5009601909796 = 3873065^2 + 2238214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010234404021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010234484021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005117202010 + 10005117202011.

It is an arithmetic number, because the mean of its divisors is an integer number (10005117202011).

Almost surely, 2^{20010234404021} is an apocalyptic number.

It is an amenable number.

20010234404021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010234404021 is an equidigital number, since it uses as much as digits as its factorization.

20010234404021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20010234404021 its reverse (12040443201002), we get a palindrome (32050677605023).

The spelling of 20010234404021 in words is "twenty trillion, ten billion, two hundred thirty-four million, four hundred four thousand, twenty-one".