20066429 has 2 divisors, whose sum is σ = 20066430. Its totient is φ = 20066428.

The previous prime is 20066401. The next prime is 20066447. The reversal of 20066429 is 92466002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20025625 + 40804 = 4475^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 20066429 - 2¹² = 20062333 is a prime.

It is equal to p_1274582 and since 20066429 and 1274582 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20066479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10033214 + 10033215.

It is an arithmetic number, because the mean of its divisors is an integer number (10033215).

Almost surely, 2^20066429 is an apocalyptic number.

It is an amenable number.

20066429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20066429 is an equidigital number, since it uses as much as digits as its factorization.

20066429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20066429 is about 4479.5567861118. The cubic root of 20066429 is about 271.7419562903.

The spelling of 20066429 in words is "twenty million, sixty-six thousand, four hundred twenty-nine".