20402554355311 has 8 divisors (see below), whose sum is σ = 20594129768784. Its totient is φ = 20211867923520.

The previous prime is 20402554355257. The next prime is 20402554355321. The reversal of 20402554355311 is 11355345520402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20402554355311 - 2¹¹ = 20402554353263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402554355321) 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 7 ways as a sum of consecutive naturals, for example, 222199305 + ... + 222291106.

It is an arithmetic number, because the mean of its divisors is an integer number (2574266221098).

Almost surely, 2^{20402554355311} is an apocalyptic number.

20402554355311 is a deficient number, since it is larger than the sum of its proper divisors (191575413473).

20402554355311 is a wasteful number, since it uses less digits than its factorization.

20402554355311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444490841.

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 20402554355311 its reverse (11355345520402), we get a palindrome (31757899875713).

The spelling of 20402554355311 in words is "twenty trillion, four hundred two billion, five hundred fifty-four million, three hundred fifty-five thousand, three hundred eleven".