20104479 has 12 divisors (see below), whose sum is σ = 29096496. Its totient is φ = 13376832.

The previous prime is 20104433. The next prime is 20104493. The reversal of 20104479 is 97440102.

It is a happy number.

It is not a de Polignac number, because 20104479 - 2⁷ = 20104351 is a prime.

It is a super-2 number, since 2×20104479² = 808380151722882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104429) 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 11 ways as a sum of consecutive naturals, for example, 3454 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (2424708).

Almost surely, 2^20104479 is an apocalyptic number.

20104479 is a deficient number, since it is larger than the sum of its proper divisors (8992017).

20104479 is a wasteful number, since it uses less digits than its factorization.

20104479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366 (or 4363 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20104479 is about 4483.8018466476. The cubic root of 20104479 is about 271.9136070422.

The spelling of 20104479 in words is "twenty million, one hundred four thousand, four hundred seventy-nine".