20377919659 has 4 divisors (see below), whose sum is σ = 20398907160. Its totient is φ = 20356932160.

The previous prime is 20377919651. The next prime is 20377919693. The reversal of 20377919659 is 95691977302.

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 20377919659 - 2³ = 20377919651 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20377919651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10492294 + ... + 10494235.

It is an arithmetic number, because the mean of its divisors is an integer number (5099726790).

Almost surely, 2^20377919659 is an apocalyptic number.

20377919659 is a deficient number, since it is larger than the sum of its proper divisors (20987501).

20377919659 is an equidigital number, since it uses as much as digits as its factorization.

20377919659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20987500.

The product of its (nonzero) digits is 6429780, while the sum is 58.

The spelling of 20377919659 in words is "twenty billion, three hundred seventy-seven million, nine hundred nineteen thousand, six hundred fifty-nine".