20566072337 has 8 divisors (see below), whose sum is σ = 21777630696. Its totient is φ = 19354712832.

The previous prime is 20566072313. The next prime is 20566072369. The reversal of 20566072337 is 73327066502.

It can be written as a sum of positive squares in 4 ways, for example, as 11797435456 + 8768636881 = 108616^2 + 93641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20566072337 - 2¹² = 20566068241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20566072294 and 20566072303.

It is not an unprimeable number, because it can be changed into a prime (20566072237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198743 + ... + 283955.

It is an arithmetic number, because the mean of its divisors is an integer number (2722203837).

Almost surely, 2^20566072337 is an apocalyptic number.

It is an amenable number.

20566072337 is a deficient number, since it is larger than the sum of its proper divisors (1211558359).

20566072337 is a wasteful number, since it uses less digits than its factorization.

20566072337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99427.

The product of its (nonzero) digits is 317520, while the sum is 41.

The spelling of 20566072337 in words is "twenty billion, five hundred sixty-six million, seventy-two thousand, three hundred thirty-seven".