20481635 has 4 divisors (see below), whose sum is σ = 24577968. Its totient is φ = 16385304.

The previous prime is 20481623. The next prime is 20481641. The reversal of 20481635 is 53618402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20481635 - 2¹⁸ = 20219491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20481598 and 20481607.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2048159 + ... + 2048168.

It is an arithmetic number, because the mean of its divisors is an integer number (6144492).

Almost surely, 2^20481635 is an apocalyptic number.

20481635 is a deficient number, since it is larger than the sum of its proper divisors (4096333).

20481635 is an equidigital number, since it uses as much as digits as its factorization.

20481635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096332.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20481635 is about 4525.6640396742. The cubic root of 20481635 is about 273.6034320315.

The spelling of 20481635 in words is "twenty million, four hundred eighty-one thousand, six hundred thirty-five".