20191677 has 32 divisors (see below), whose sum is σ = 31518720. Its totient is φ = 11373120.

The previous prime is 20191673. The next prime is 20191687. The reversal of 20191677 is 77619102.

It is not a de Polignac number, because 20191677 - 2² = 20191673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20191673) 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 31 ways as a sum of consecutive naturals, for example, 27724 + ... + 28442.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^20191677 is an apocalyptic number.

It is an amenable number.

20191677 is a deficient number, since it is larger than the sum of its proper divisors (11327043).

20191677 is a wasteful number, since it uses less digits than its factorization.

20191677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 20191677 is about 4493.5149938550. The cubic root of 20191677 is about 272.3061584720.

The spelling of 20191677 in words is "twenty million, one hundred ninety-one thousand, six hundred seventy-seven".