20660240059 has 4 divisors (see below), whose sum is σ = 21372662160. Its totient is φ = 19947817960.

The previous prime is 20660240053. The next prime is 20660240071. The reversal of 20660240059 is 95004206602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20660240059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20660240053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356211007 + ... + 356211064.

It is an arithmetic number, because the mean of its divisors is an integer number (5343165540).

Almost surely, 2^20660240059 is an apocalyptic number.

20660240059 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20660240059 is a deficient number, since it is larger than the sum of its proper divisors (712422101).

20660240059 is an equidigital number, since it uses as much as digits as its factorization.

20660240059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712422100.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20660240059 in words is "twenty billion, six hundred sixty million, two hundred forty thousand, fifty-nine".