20134402213243 has 4 divisors (see below), whose sum is σ = 21318778814040. Its totient is φ = 18950025612448.

The previous prime is 20134402213229. The next prime is 20134402213319. The reversal of 20134402213243 is 34231220443102.

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

It is a cyclic number.

It is not a de Polignac number, because 20134402213243 - 2²¹ = 20134400116091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20134402513243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592188300373 + ... + 592188300406.

It is an arithmetic number, because the mean of its divisors is an integer number (5329694703510).

Almost surely, 2^{20134402213243} is an apocalyptic number.

20134402213243 is a deficient number, since it is larger than the sum of its proper divisors (1184376600797).

20134402213243 is a wasteful number, since it uses less digits than its factorization.

20134402213243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184376600796.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 20134402213243 its reverse (34231220443102), we get a palindrome (54365622656345).

The spelling of 20134402213243 in words is "twenty trillion, one hundred thirty-four billion, four hundred two million, two hundred thirteen thousand, two hundred forty-three".