20233551361673 has 4 divisors (see below), whose sum is σ = 21789978389508. Its totient is φ = 18677124333840.

The previous prime is 20233551361631. The next prime is 20233551361697. The reversal of 20233551361673 is 37616315533202.

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 7772425440649 + 12461125921024 = 2787907^2 + 3530032^2 .

It is a cyclic number.

It is not a de Polignac number, because 20233551361673 - 2²² = 20233547167369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20233551361973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778213513898 + ... + 778213513923.

It is an arithmetic number, because the mean of its divisors is an integer number (5447494597377).

Almost surely, 2^{20233551361673} is an apocalyptic number.

It is an amenable number.

20233551361673 is a deficient number, since it is larger than the sum of its proper divisors (1556427027835).

20233551361673 is a wasteful number, since it uses less digits than its factorization.

20233551361673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556427027834.

The product of its (nonzero) digits is 2041200, while the sum is 47.

Adding to 20233551361673 its reverse (37616315533202), we get a palindrome (57849866894875).

The spelling of 20233551361673 in words is "twenty trillion, two hundred thirty-three billion, five hundred fifty-one million, three hundred sixty-one thousand, six hundred seventy-three".