20554262610433 has 4 divisors (see below), whose sum is σ = 20556066735108. Its totient is φ = 20552458485760.

The previous prime is 20554262610419. The next prime is 20554262610481. The reversal of 20554262610433 is 33401626245502.

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 12215982648769 + 8338279961664 = 3495137^2 + 2887608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20554262610433 is a prime.

It is a super-2 number, since 2×20554262610433² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20554262610433.

It is not an unprimeable number, because it can be changed into a prime (20554262610533) 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, 902045248 + ... + 902068033.

It is an arithmetic number, because the mean of its divisors is an integer number (5139016683777).

Almost surely, 2^{20554262610433} is an apocalyptic number.

It is an amenable number.

20554262610433 is a deficient number, since it is larger than the sum of its proper divisors (1804124675).

20554262610433 is a wasteful number, since it uses less digits than its factorization.

20554262610433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804124674.

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 20554262610433 its reverse (33401626245502), we get a palindrome (53955888855935).

The spelling of 20554262610433 in words is "twenty trillion, five hundred fifty-four billion, two hundred sixty-two million, six hundred ten thousand, four hundred thirty-three".