20213142342401 has 4 divisors (see below), whose sum is σ = 20213693010900. Its totient is φ = 20212591673904.

The previous prime is 20213142342391. The next prime is 20213142342443. The reversal of 20213142342401 is 10424324131202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16473370387600 + 3739771954801 = 4058740^2 + 1933849^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213142342401 - 2¹⁰ = 20213142341377 is a prime.

It is a super-2 number, since 2×20213142342401² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213142342451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275279186 + ... + 275352603.

It is an arithmetic number, because the mean of its divisors is an integer number (5053423252725).

Almost surely, 2^{20213142342401} is an apocalyptic number.

It is an amenable number.

20213142342401 is a deficient number, since it is larger than the sum of its proper divisors (550668499).

20213142342401 is an equidigital number, since it uses as much as digits as its factorization.

20213142342401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550668498.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 20213142342401 its reverse (10424324131202), we get a palindrome (30637466473603).

The spelling of 20213142342401 in words is "twenty trillion, two hundred thirteen billion, one hundred forty-two million, three hundred forty-two thousand, four hundred one".