20479236 has 12 divisors (see below), whose sum is σ = 47784912. Its totient is φ = 6826408.

The previous prime is 20479231. The next prime is 20479243. The reversal of 20479236 is 63297402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20479197 and 20479206.

It is not an unprimeable number, because it can be changed into a prime (20479231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853290 + ... + 853313.

It is an arithmetic number, because the mean of its divisors is an integer number (3982076).

Almost surely, 2^20479236 is an apocalyptic number.

It is an amenable number.

20479236 is an abundant number, since it is smaller than the sum of its proper divisors (27305676).

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

20479236 is a wasteful number, since it uses less digits than its factorization.

20479236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706610 (or 1706608 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 20479236 is about 4525.3989879347. The cubic root of 20479236 is about 273.5927492863.

The spelling of 20479236 in words is "twenty million, four hundred seventy-nine thousand, two hundred thirty-six".