20104477 has 8 divisors (see below), whose sum is σ = 20417400. Its totient is φ = 19793664.

The previous prime is 20104433. The next prime is 20104493. The reversal of 20104477 is 77440102.

It can be written as a sum of positive squares in 4 ways, for example, as 337561 + 19766916 = 581^2 + 4446^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20104477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35049 + ... + 35617.

It is an arithmetic number, because the mean of its divisors is an integer number (2552175).

Almost surely, 2^20104477 is an apocalyptic number.

It is an amenable number.

20104477 is a deficient number, since it is larger than the sum of its proper divisors (312923).

20104477 is an equidigital number, since it uses as much as digits as its factorization.

20104477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20104477 is about 4483.8016236225. The cubic root of 20104477 is about 271.9135980255.

Adding to 20104477 its reverse (77440102), we get a palindrome (97544579).

The spelling of 20104477 in words is "twenty million, one hundred four thousand, four hundred seventy-seven".