20137766659 has 4 divisors (see below), whose sum is σ = 20142650304. Its totient is φ = 20132883016.

The previous prime is 20137766609. The next prime is 20137766669. The reversal of 20137766659 is 95666773102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20137766659 - 2⁹ = 20137766147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20137766609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2435632 + ... + 2443885.

It is an arithmetic number, because the mean of its divisors is an integer number (5035662576).

Almost surely, 2^20137766659 is an apocalyptic number.

20137766659 is a deficient number, since it is larger than the sum of its proper divisors (4883645).

20137766659 is an equidigital number, since it uses as much as digits as its factorization.

20137766659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883644.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 20137766659 in words is "twenty billion, one hundred thirty-seven million, seven hundred sixty-six thousand, six hundred fifty-nine".