20799798 has 8 divisors (see below), whose sum is σ = 41599608. Its totient is φ = 6933264.

The previous prime is 20799769. The next prime is 20799799. The reversal of 20799798 is 89799702.

It is a happy number.

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

20799798 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20799798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20799799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1733311 + ... + 1733322.

It is an arithmetic number, because the mean of its divisors is an integer number (5199951).

Almost surely, 2^20799798 is an apocalyptic number.

20799798 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20799798 is a wasteful number, since it uses less digits than its factorization.

20799798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3466638.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 20799798 is about 4560.6795546278. The cubic root of 20799798 is about 275.0128831430.

The spelling of 20799798 in words is "twenty million, seven hundred ninety-nine thousand, seven hundred ninety-eight".