20950169 has 2 divisors, whose sum is σ = 20950170. Its totient is φ = 20950168.

The previous prime is 20950147. The next prime is 20950187. The reversal of 20950169 is 96105902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 5583769 = 3920^2 + 2363^2 .

It is a cyclic number.

It is not a de Polignac number, because 20950169 - 2¹² = 20946073 is a prime.

It is a super-2 number, since 2×20950169² = 877819162257122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20950469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10475084 + 10475085.

It is an arithmetic number, because the mean of its divisors is an integer number (10475085).

Almost surely, 2^20950169 is an apocalyptic number.

It is an amenable number.

20950169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20950169 is an equidigital number, since it uses as much as digits as its factorization.

20950169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 20950169 is about 4577.1354579038. The cubic root of 20950169 is about 275.6740226596.

The spelling of 20950169 in words is "twenty million, nine hundred fifty thousand, one hundred sixty-nine".