20363434342021 has 2 divisors, whose sum is σ = 20363434342022. Its totient is φ = 20363434342020.

The previous prime is 20363434342003. The next prime is 20363434342057. The reversal of 20363434342021 is 12024343436302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11008553311396 + 9354881030625 = 3317914^2 + 3058575^2 .

It is a cyclic number.

It is not a de Polignac number, because 20363434342021 - 2⁵ = 20363434341989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20363434342621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10181717171010 + 10181717171011.

It is an arithmetic number, because the mean of its divisors is an integer number (10181717171011).

Almost surely, 2^{20363434342021} is an apocalyptic number.

It is an amenable number.

20363434342021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20363434342021 is an equidigital number, since it uses as much as digits as its factorization.

20363434342021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 37.

Adding to 20363434342021 its reverse (12024343436302), we get a palindrome (32387777778323).

The spelling of 20363434342021 in words is "twenty trillion, three hundred sixty-three billion, four hundred thirty-four million, three hundred forty-two thousand, twenty-one".