20172502077 has 16 divisors (see below), whose sum is σ = 33103593600. Its totient is φ = 10640440512.

The previous prime is 20172502013. The next prime is 20172502081. The reversal of 20172502077 is 77020527102.

It is not a de Polignac number, because 20172502077 - 2⁶ = 20172502013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20172502477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36945702 + ... + 36946247.

It is an arithmetic number, because the mean of its divisors is an integer number (2068974600).

Almost surely, 2^20172502077 is an apocalyptic number.

It is an amenable number.

20172502077 is a deficient number, since it is larger than the sum of its proper divisors (12931091523).

20172502077 is a wasteful number, since it uses less digits than its factorization.

20172502077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73891972.

The product of its (nonzero) digits is 13720, while the sum is 33.

The spelling of 20172502077 in words is "twenty billion, one hundred seventy-two million, five hundred two thousand, seventy-seven".