20655662131 has 8 divisors (see below), whose sum is σ = 22717848384. Its totient is φ = 18661088640.

The previous prime is 20655662129. The next prime is 20655662161. The reversal of 20655662131 is 13126655602.

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 20655662131 - 2¹ = 20655662129 is a prime.

It is a super-2 number, since 2×20655662131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20655662101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16902550 + ... + 16903771.

It is an arithmetic number, because the mean of its divisors is an integer number (2839731048).

Almost surely, 2^20655662131 is an apocalyptic number.

20655662131 is a deficient number, since it is larger than the sum of its proper divisors (2062186253).

20655662131 is a wasteful number, since it uses less digits than its factorization.

20655662131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33806381.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 20655662131 in words is "twenty billion, six hundred fifty-five million, six hundred sixty-two thousand, one hundred thirty-one".