20630666133 has 72 divisors (see below), whose sum is σ = 37480183104. Its totient is φ = 10704165120.

The previous prime is 20630666071. The next prime is 20630666153. The reversal of 20630666133 is 33166603602.

It is a happy number.

It is not a de Polignac number, because 20630666133 - 2⁹ = 20630665621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630666153) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11608941 + ... + 11610717.

Almost surely, 2^20630666133 is an apocalyptic number.

It is an amenable number.

20630666133 is a deficient number, since it is larger than the sum of its proper divisors (16849516971).

20630666133 is a wasteful number, since it uses less digits than its factorization.

20630666133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3321 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The spelling of 20630666133 in words is "twenty billion, six hundred thirty million, six hundred sixty-six thousand, one hundred thirty-three".