20798013 has 8 divisors (see below), whose sum is σ = 27897408. Its totient is φ = 13781984.

The previous prime is 20797999. The next prime is 20798051. The reversal of 20798013 is 31089702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20798013 - 2⁵ = 20797981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20798083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20256 + ... + 21257.

It is an arithmetic number, because the mean of its divisors is an integer number (3487176).

Almost surely, 2^20798013 is an apocalyptic number.

It is an amenable number.

20798013 is a deficient number, since it is larger than the sum of its proper divisors (7099395).

20798013 is a wasteful number, since it uses less digits than its factorization.

20798013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41683.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 20798013 is about 4560.4838559083. The cubic root of 20798013 is about 275.0050158865.

The spelling of 20798013 in words is "twenty million, seven hundred ninety-eight thousand, thirteen".