20168445077 has 8 divisors (see below), whose sum is σ = 22019741472. Its totient is φ = 18320115600.

The previous prime is 20168445061. The next prime is 20168445113. The reversal of 20168445077 is 77054486102.

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 20168445077 - 2⁴ = 20168445061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168445377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727499 + ... + 754712.

It is an arithmetic number, because the mean of its divisors is an integer number (2752467684).

Almost surely, 2^20168445077 is an apocalyptic number.

It is an amenable number.

20168445077 is a deficient number, since it is larger than the sum of its proper divisors (1851296395).

20168445077 is a wasteful number, since it uses less digits than its factorization.

20168445077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483459.

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 20168445077 in words is "twenty billion, one hundred sixty-eight million, four hundred forty-five thousand, seventy-seven".