20516366133 has 6 divisors (see below), whose sum is σ = 29634751094. Its totient is φ = 13677577416.

The previous prime is 20516366119. The next prime is 20516366141. The reversal of 20516366133 is 33166361502.

20516366133 is a `hidden beast` number, since 2 + 0 + 5 + 1 + 6 + 36 + 613 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18171579204 + 2344786929 = 134802^2 + 48423^2 .

It is not a de Polignac number, because 20516366133 - 2¹² = 20516362037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516366033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1139798110 + ... + 1139798127.

Almost surely, 2^20516366133 is an apocalyptic number.

It is an amenable number.

20516366133 is a deficient number, since it is larger than the sum of its proper divisors (9118384961).

20516366133 is a wasteful number, since it uses less digits than its factorization.

20516366133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279596243 (or 2279596240 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 20516366133 in words is "twenty billion, five hundred sixteen million, three hundred sixty-six thousand, one hundred thirty-three".