20009029 has 2 divisors, whose sum is σ = 20009030. Its totient is φ = 20009028.

The previous prime is 20008999. The next prime is 20009047. The reversal of 20009029 is 92090002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11068929 + 8940100 = 3327^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 20009029 - 2¹³ = 20000837 is a prime.

It is a super-2 number, since 2×20009029² = 800722483045682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20009329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004514 + 10004515.

It is an arithmetic number, because the mean of its divisors is an integer number (10004515).

Almost surely, 2^20009029 is an apocalyptic number.

It is an amenable number.

20009029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20009029 is an equidigital number, since it uses as much as digits as its factorization.

20009029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20009029 is about 4473.1453139821. The cubic root of 20009029 is about 271.4826029753.

The spelling of 20009029 in words is "twenty million, nine thousand, twenty-nine".