20479798 has 16 divisors (see below), whose sum is σ = 33942240. Its totient is φ = 9218176.

The previous prime is 20479793. The next prime is 20479801. The reversal of 20479798 is 89797402.

It is a super-2 number, since 2×20479798² = 838844252241608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20479793) 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, 12313 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (2121390).

Almost surely, 2^20479798 is an apocalyptic number.

20479798 is a deficient number, since it is larger than the sum of its proper divisors (13462442).

20479798 is a wasteful number, since it uses less digits than its factorization.

20479798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26231.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 20479798 is about 4525.4610814811. The cubic root of 20479798 is about 273.5952519467.

The spelling of 20479798 in words is "twenty million, four hundred seventy-nine thousand, seven hundred ninety-eight".