20169629 has 2 divisors, whose sum is σ = 20169630. Its totient is φ = 20169628.

The previous prime is 20169619. The next prime is 20169637. The reversal of 20169629 is 92696102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 1876900 = 4277^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 20169629 - 2¹² = 20165533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20169619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10084814 + 10084815.

It is an arithmetic number, because the mean of its divisors is an integer number (10084815).

Almost surely, 2^20169629 is an apocalyptic number.

It is an amenable number.

20169629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20169629 is an equidigital number, since it uses as much as digits as its factorization.

20169629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 20169629 is about 4491.0610104963. The cubic root of 20169629 is about 272.2070088279.

The spelling of 20169629 in words is "twenty million, one hundred sixty-nine thousand, six hundred twenty-nine".