20211179 has 4 divisors (see below), whose sum is σ = 20592576. Its totient is φ = 19829784.

The previous prime is 20211167. The next prime is 20211187. The reversal of 20211179 is 97111202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97111202 = 2 ⋅48555601.

It is a cyclic number.

It is not a de Polignac number, because 20211179 - 2⁸ = 20210923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190619 + ... + 190724.

It is an arithmetic number, because the mean of its divisors is an integer number (5148144).

Almost surely, 2^20211179 is an apocalyptic number.

20211179 is a deficient number, since it is larger than the sum of its proper divisors (381397).

20211179 is an equidigital number, since it uses as much as digits as its factorization.

20211179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381396.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 20211179 is about 4495.6844862601. The cubic root of 20211179 is about 272.3937986402.

Adding to 20211179 its sum of digits (23), we get a palindrome (20211202).

The spelling of 20211179 in words is "twenty million, two hundred eleven thousand, one hundred seventy-nine".