20131406655 has 16 divisors (see below), whose sum is σ = 32281999200. Its totient is φ = 10712834048.

The previous prime is 20131406641. The next prime is 20131406689. The reversal of 20131406655 is 55660413102.

It is a cyclic number.

It is not a de Polignac number, because 20131406655 - 2⁴ = 20131406639 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1487802 + ... + 1501271.

It is an arithmetic number, because the mean of its divisors is an integer number (2017624950).

Almost surely, 2^20131406655 is an apocalyptic number.

20131406655 is a deficient number, since it is larger than the sum of its proper divisors (12150592545).

20131406655 is a wasteful number, since it uses less digits than its factorization.

20131406655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989530.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 20131406655 its reverse (55660413102), we get a palindrome (75791819757).

The spelling of 20131406655 in words is "twenty billion, one hundred thirty-one million, four hundred six thousand, six hundred fifty-five".