20662606964 has 6 divisors (see below), whose sum is σ = 36159562194. Its totient is φ = 10331303480.

The previous prime is 20662606963. The next prime is 20662607033. The reversal of 20662606964 is 46960626602.

It can be written as a sum of positive squares in only one way, i.e., 15378480100 + 5284126864 = 124010^2 + 72692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662606961) 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 as a sum of consecutive naturals, namely, 2582825867 + ... + 2582825874.

It is an arithmetic number, because the mean of its divisors is an integer number (6026593699).

Almost surely, 2^20662606964 is an apocalyptic number.

It is an amenable number.

20662606964 is a deficient number, since it is larger than the sum of its proper divisors (15496955230).

20662606964 is a wasteful number, since it uses less digits than its factorization.

20662606964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5165651745 (or 5165651743 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 20662606964 in words is "twenty billion, six hundred sixty-two million, six hundred six thousand, nine hundred sixty-four".