20136408 has 32 divisors (see below), whose sum is σ = 52531200. Its totient is φ = 6420128.

The previous prime is 20136407. The next prime is 20136419. The reversal of 20136408 is 80463102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 17688 + ... + 18791.

It is an arithmetic number, because the mean of its divisors is an integer number (1641600).

Almost surely, 2^20136408 is an apocalyptic number.

It is an amenable number.

20136408 is an abundant number, since it is smaller than the sum of its proper divisors (32394792).

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

20136408 is a wasteful number, since it uses less digits than its factorization.

20136408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36511 (or 36507 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20136408 is about 4487.3609170647. The cubic root of 20136408 is about 272.0574777609.

The spelling of 20136408 in words is "twenty million, one hundred thirty-six thousand, four hundred eight".