20408059 has 6 divisors (see below), whose sum is σ = 23740044. Its totient is φ = 17492580.

The previous prime is 20408051. The next prime is 20408077. The reversal of 20408059 is 95080402.

It is a happy number.

It is not a de Polignac number, because 20408059 - 2³ = 20408051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20408051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208197 + ... + 208294.

It is an arithmetic number, because the mean of its divisors is an integer number (3956674).

Almost surely, 2^20408059 is an apocalyptic number.

20408059 is a deficient number, since it is larger than the sum of its proper divisors (3331985).

20408059 is an equidigital number, since it uses as much as digits as its factorization.

20408059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416505 (or 416498 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20408059 is about 4517.5279744568. The cubic root of 20408059 is about 273.2754178636.

The spelling of 20408059 in words is "twenty million, four hundred eight thousand, fifty-nine".