20163469 has 2 divisors, whose sum is σ = 20163470. Its totient is φ = 20163468.

The previous prime is 20163463. The next prime is 20163491. The reversal of 20163469 is 96436102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19474569 + 688900 = 4413^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 20163469 - 2³ = 20163461 is a prime.

It is a super-2 number, since 2×20163469² = 813130964227922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20163469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20163461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10081734 + 10081735.

It is an arithmetic number, because the mean of its divisors is an integer number (10081735).

Almost surely, 2^20163469 is an apocalyptic number.

It is an amenable number.

20163469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20163469 is an equidigital number, since it uses as much as digits as its factorization.

20163469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 20163469 is about 4490.3751513654. The cubic root of 20163469 is about 272.1792944542.

The spelling of 20163469 in words is "twenty million, one hundred sixty-three thousand, four hundred sixty-nine".