20898029 has 4 divisors (see below), whose sum is σ = 20935200. Its totient is φ = 20860860.

The previous prime is 20897993. The next prime is 20898041. The reversal of 20898029 is 92089802.

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 20898029 - 2¹² = 20893933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20897983 and 20898001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20898529) 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, 17729 + ... + 18870.

It is an arithmetic number, because the mean of its divisors is an integer number (5233800).

Almost surely, 2^20898029 is an apocalyptic number.

It is an amenable number.

20898029 is a deficient number, since it is larger than the sum of its proper divisors (37171).

20898029 is an equidigital number, since it uses as much as digits as its factorization.

20898029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37170.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 20898029 is about 4571.4362075829. The cubic root of 20898029 is about 275.4451369283.

The spelling of 20898029 in words is "twenty million, eight hundred ninety-eight thousand, twenty-nine".