20408896 has 14 divisors (see below), whose sum is σ = 40499030. Its totient is φ = 10204416.

The previous prime is 20408893. The next prime is 20408909. The reversal of 20408896 is 69880402.

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 2768896 = 4200^2 + 1664^2 .

It is not an unprimeable number, because it can be changed into a prime (20408893) 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 as a sum of consecutive naturals, namely, 159381 + ... + 159508.

Almost surely, 2^20408896 is an apocalyptic number.

It is an amenable number.

20408896 is a deficient number, since it is larger than the sum of its proper divisors (20090134).

20408896 is an equidigital number, since it uses as much as digits as its factorization.

20408896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318901 (or 318891 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20408896 is about 4517.6206126677. The cubic root of 20408896 is about 273.2791537798.

The spelling of 20408896 in words is "twenty million, four hundred eight thousand, eight hundred ninety-six".