20408046 has 16 divisors (see below), whose sum is σ = 40941264. Its totient is φ = 6781824.

The previous prime is 20408039. The next prime is 20408051. The reversal of 20408046 is 64080402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3025 + ... + 7068.

It is an arithmetic number, because the mean of its divisors is an integer number (2558829).

Almost surely, 2^20408046 is an apocalyptic number.

20408046 is an abundant number, since it is smaller than the sum of its proper divisors (20533218).

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

20408046 is a wasteful number, since it uses less digits than its factorization.

20408046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10435.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 20408046 is about 4517.5265356166. The cubic root of 20408046 is about 273.2753598378.

Adding to 20408046 its reverse (64080402), we get a palindrome (84488448).

The spelling of 20408046 in words is "twenty million, four hundred eight thousand, forty-six".