20209029 has 4 divisors (see below), whose sum is σ = 26945376. Its totient is φ = 13472684.

The previous prime is 20209003. The next prime is 20209043. The reversal of 20209029 is 92090202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20209029 - 2⁷ = 20208901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20209429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368169 + ... + 3368174.

It is an arithmetic number, because the mean of its divisors is an integer number (6736344).

Almost surely, 2^20209029 is an apocalyptic number.

It is an amenable number.

20209029 is a deficient number, since it is larger than the sum of its proper divisors (6736347).

20209029 is an equidigital number, since it uses as much as digits as its factorization.

20209029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6736346.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 20209029 is about 4495.4453616967. The cubic root of 20209029 is about 272.3841395066.

The spelling of 20209029 in words is "twenty million, two hundred nine thousand, twenty-nine".