20136404 has 12 divisors (see below), whose sum is σ = 35296800. Its totient is φ = 10051608.

The previous prime is 20136383. The next prime is 20136407. The reversal of 20136404 is 40463102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136407) 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 in 3 ways as a sum of consecutive naturals, for example, 1184 + ... + 6455.

It is an arithmetic number, because the mean of its divisors is an integer number (2941400).

Almost surely, 2^20136404 is an apocalyptic number.

It is an amenable number.

20136404 is a deficient number, since it is larger than the sum of its proper divisors (15160396).

20136404 is a wasteful number, since it uses less digits than its factorization.

20136404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8302 (or 8300 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20136404 is about 4487.3604713684. The cubic root of 20136404 is about 272.0574597466.

Adding to 20136404 its reverse (40463102), we get a palindrome (60599506).

The spelling of 20136404 in words is "twenty million, one hundred thirty-six thousand, four hundred four".