20348505 has 36 divisors (see below), whose sum is σ = 36286380. Its totient is φ = 10548480.

The previous prime is 20348501. The next prime is 20348539. The reversal of 20348505 is 50584302.

It can be written as a sum of positive squares in 6 ways, for example, as 12446784 + 7901721 = 3528^2 + 2811^2 .

It is not a de Polignac number, because 20348505 - 2² = 20348501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20348501) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 75511 + ... + 75779.

It is an arithmetic number, because the mean of its divisors is an integer number (1007955).

Almost surely, 2^20348505 is an apocalyptic number.

It is an amenable number.

20348505 is a deficient number, since it is larger than the sum of its proper divisors (15937875).

20348505 is a wasteful number, since it uses less digits than its factorization.

20348505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20348505 is about 4510.9317219395. The cubic root of 20348505 is about 273.0093383273.

The spelling of 20348505 in words is "twenty million, three hundred forty-eight thousand, five hundred five".