20665455626630 has 16 divisors (see below), whose sum is σ = 37215177992064. Its totient is φ = 8262324947520.

The previous prime is 20665455626617. The next prime is 20665455626633. The reversal of 20665455626630 is 3662655456602.

It is a super-2 number, since 2×20665455626630² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20665455626633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482140391 + ... + 482183250.

It is an arithmetic number, because the mean of its divisors is an integer number (2325948624504).

Almost surely, 2^{20665455626630} is an apocalyptic number.

20665455626630 is a deficient number, since it is larger than the sum of its proper divisors (16549722365434).

20665455626630 is a wasteful number, since it uses less digits than its factorization.

20665455626630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964325791.

The product of its (nonzero) digits is 46656000, while the sum is 56.

The spelling of 20665455626630 in words is "twenty trillion, six hundred sixty-five billion, four hundred fifty-five million, six hundred twenty-six thousand, six hundred thirty".