20504035 has 4 divisors (see below), whose sum is σ = 24604848. Its totient is φ = 16403224.

The previous prime is 20504009. The next prime is 20504053. The reversal of 20504035 is 53040502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53040502 = 2 ⋅26520251.

It is a cyclic number.

It is not a de Polignac number, because 20504035 - 2⁹ = 20503523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050399 + ... + 2050408.

It is an arithmetic number, because the mean of its divisors is an integer number (6151212).

Almost surely, 2^20504035 is an apocalyptic number.

20504035 is a deficient number, since it is larger than the sum of its proper divisors (4100813).

20504035 is an equidigital number, since it uses as much as digits as its factorization.

20504035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100812.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 20504035 is about 4528.1381383522. The cubic root of 20504035 is about 273.7031389801.

Adding to 20504035 its reverse (53040502), we get a palindrome (73544537).

The spelling of 20504035 in words is "twenty million, five hundred four thousand, thirty-five".