20343220571066 has 4 divisors (see below), whose sum is σ = 30514830856602. Its totient is φ = 10171610285532.

The previous prime is 20343220571039. The next prime is 20343220571071. The reversal of 20343220571066 is 66017502234302.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 19488437114041 + 854783457025 = 4414571^2 + 924545^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5085805142765 + ... + 5085805142768.

Almost surely, 2^{20343220571066} is an apocalyptic number.

20343220571066 is a deficient number, since it is larger than the sum of its proper divisors (10171610285536).

20343220571066 is a wasteful number, since it uses less digits than its factorization.

20343220571066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10171610285535.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 20343220571066 in words is "twenty trillion, three hundred forty-three billion, two hundred twenty million, five hundred seventy-one thousand, sixty-six".