20012177 has 4 divisors (see below), whose sum is σ = 20438016. Its totient is φ = 19586340.

The previous prime is 20012171. The next prime is 20012189. The reversal of 20012177 is 77121002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20012177 - 2¹⁰ = 20011153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212849 + ... + 212942.

It is an arithmetic number, because the mean of its divisors is an integer number (5109504).

Almost surely, 2^20012177 is an apocalyptic number.

It is an amenable number.

20012177 is a deficient number, since it is larger than the sum of its proper divisors (425839).

20012177 is an equidigital number, since it uses as much as digits as its factorization.

20012177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425838.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 20012177 is about 4473.4971778241. The cubic root of 20012177 is about 271.4968395885.

Adding to 20012177 its reverse (77121002), we get a palindrome (97133179).

The spelling of 20012177 in words is "twenty million, twelve thousand, one hundred seventy-seven".