20348785 has 4 divisors (see below), whose sum is σ = 24418548. Its totient is φ = 16279024.

The previous prime is 20348759. The next prime is 20348819. The reversal of 20348785 is 58784302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9928801 + 10419984 = 3151^2 + 3228^2 .

It is a cyclic number.

It is not a de Polignac number, because 20348785 - 2¹⁵ = 20316017 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, 2034874 + ... + 2034883.

It is an arithmetic number, because the mean of its divisors is an integer number (6104637).

Almost surely, 2^20348785 is an apocalyptic number.

It is an amenable number.

20348785 is a deficient number, since it is larger than the sum of its proper divisors (4069763).

20348785 is an equidigital number, since it uses as much as digits as its factorization.

20348785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069762.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20348785 is about 4510.9627575497. The cubic root of 20348785 is about 273.0105905448.

Subtracting from 20348785 its product of nonzero digits (53760), we obtain a square (20295025 = 4505²).

The spelling of 20348785 in words is "twenty million, three hundred forty-eight thousand, seven hundred eighty-five".