20360506 has 4 divisors (see below), whose sum is σ = 30540762. Its totient is φ = 10180252.

The previous prime is 20360491. The next prime is 20360507. The reversal of 20360506 is 60506302.

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

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 5958481 = 3795^2 + 2441^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20360507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090125 + ... + 5090128.

Almost surely, 2^20360506 is an apocalyptic number.

20360506 is a deficient number, since it is larger than the sum of its proper divisors (10180256).

20360506 is a wasteful number, since it uses less digits than its factorization.

20360506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180255.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20360506 is about 4512.2617388622. The cubic root of 20360506 is about 273.0629989635.

Adding to 20360506 its reverse (60506302), we get a palindrome (80866808).

The spelling of 20360506 in words is "twenty million, three hundred sixty thousand, five hundred six".