20162869 has 2 divisors, whose sum is σ = 20162870. Its totient is φ = 20162868.

The previous prime is 20162851. The next prime is 20162873. The reversal of 20162869 is 96826102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 315844 = 4455^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 20162869 - 2¹¹ = 20160821 is a prime.

It is a super-2 number, since 2×20162869² = 813082572622322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20162899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10081434 + 10081435.

It is an arithmetic number, because the mean of its divisors is an integer number (10081435).

Almost surely, 2^20162869 is an apocalyptic number.

It is an amenable number.

20162869 is a deficient number, since it is larger than the sum of its proper divisors (1).

20162869 is an equidigital number, since it uses as much as digits as its factorization.

20162869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20162869 is about 4490.3083413058. The cubic root of 20162869 is about 272.1765947005.

The spelling of 20162869 in words is "twenty million, one hundred sixty-two thousand, eight hundred sixty-nine".