20404002 has 16 divisors (see below), whose sum is σ = 40933152. Its totient is φ = 6780480.

The previous prime is 20403989. The next prime is 20404009. The reversal of 20404002 is 20040402.

It is not an unprimeable number, because it can be changed into a prime (20404009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3024 + ... + 7067.

It is an arithmetic number, because the mean of its divisors is an integer number (2558322).

Almost surely, 2^20404002 is an apocalyptic number.

20404002 is an abundant number, since it is smaller than the sum of its proper divisors (20529150).

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

20404002 is a wasteful number, since it uses less digits than its factorization.

20404002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 20404002 is about 4517.0789233751. The cubic root of 20404002 is about 273.2573081576.

Adding to 20404002 its reverse (20040402), we get a palindrome (40444404).

It can be divided in two parts, 2040400 and 2, that added together give a palindrome (2040402).

The spelling of 20404002 in words is "twenty million, four hundred four thousand, two".