20200404 has 48 divisors (see below), whose sum is σ = 54423936. Its totient is φ = 5712000.

The previous prime is 20200393. The next prime is 20200429. The reversal of 20200404 is 40400202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20200404.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7294 + ... + 9674.

It is an arithmetic number, because the mean of its divisors is an integer number (1133832).

Almost surely, 2^20200404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20200404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27211968).

20200404 is an abundant number, since it is smaller than the sum of its proper divisors (34223532).

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

20200404 is a wasteful number, since it uses less digits than its factorization.

20200404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496 (or 2494 counting only the distinct ones).

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

The square root of 20200404 is about 4494.4859550342. The cubic root of 20200404 is about 272.3453837686.

Adding to 20200404 its reverse (40400202), we get a palindrome (60600606).

The spelling of 20200404 in words is "twenty million, two hundred thousand, four hundred four".