20479040 has 28 divisors (see below), whose sum is σ = 48766476. Its totient is φ = 8191488.

The previous prime is 20479031. The next prime is 20479057. The reversal of 20479040 is 4097402.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 8479744 = 3464^2 + 2912^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31679 + ... + 32318.

Almost surely, 2^20479040 is an apocalyptic number.

20479040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20479040 is an abundant number, since it is smaller than the sum of its proper divisors (28287436).

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

20479040 is an equidigital number, since it uses as much as digits as its factorization.

20479040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64014 (or 64004 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20479040 is about 4525.3773323337. The cubic root of 20479040 is about 273.5918764616.

The spelling of 20479040 in words is "twenty million, four hundred seventy-nine thousand, forty".