20367169 has 3 divisors (see below), whose sum is σ = 20371683. Its totient is φ = 20362656.

The previous prime is 20367143. The next prime is 20367181. The reversal of 20367169 is 96176302.

The square root of 20367169 is 4513.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9025 + 20358144 = 95^2 + 4512^2 .

It is not a de Polignac number, because 20367169 - 2⁹ = 20366657 is a prime.

It is a super-2 number, since 2×20367169² = 829643146149122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20367199) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2257 + ... + 6769.

It is an arithmetic number, because the mean of its divisors is an integer number (6790561).

Almost surely, 2^20367169 is an apocalyptic number.

20367169 is the 4513-rd square number.

20367169 is the 2257-th centered octagonal number.

It is an amenable number.

20367169 is a deficient number, since it is larger than the sum of its proper divisors (4514).

20367169 is an frugal number, since it uses more digits than its factorization.

20367169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9026 (or 4513 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The cubic root of 20367169 is about 273.0927824461.

The spelling of 20367169 in words is "twenty million, three hundred sixty-seven thousand, one hundred sixty-nine".