20366746506 has 12 divisors (see below), whose sum is σ = 44127950802. Its totient is φ = 6788915496.

The previous prime is 20366746489. The next prime is 20366746507. The reversal of 20366746506 is 60564766302.

It can be written as a sum of positive squares in only one way, i.e., 20005556481 + 361190025 = 141441^2 + 19005^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20366746507) 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, 565742941 + ... + 565742976.

Almost surely, 2^20366746506 is an apocalyptic number.

20366746506 is an abundant number, since it is smaller than the sum of its proper divisors (23761204296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20366746506 is a wasteful number, since it uses less digits than its factorization.

20366746506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131485925 (or 1131485922 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 20366746506 in words is "twenty billion, three hundred sixty-six million, seven hundred forty-six thousand, five hundred six".