20104438 has 32 divisors (see below), whose sum is σ = 34089984. Its totient is φ = 8840832.

The previous prime is 20104433. The next prime is 20104493. The reversal of 20104438 is 83440102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104433) 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 15 ways as a sum of consecutive naturals, for example, 36481 + ... + 37027.

It is an arithmetic number, because the mean of its divisors is an integer number (1065312).

Almost surely, 2^20104438 is an apocalyptic number.

20104438 is a deficient number, since it is larger than the sum of its proper divisors (13985546).

20104438 is a wasteful number, since it uses less digits than its factorization.

20104438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20104438 is about 4483.7972746323. The cubic root of 20104438 is about 271.9134222000.

The spelling of 20104438 in words is "twenty million, one hundred four thousand, four hundred thirty-eight".