20260506 has 16 divisors (see below), whose sum is σ = 46309824. Its totient is φ = 5788704.

The previous prime is 20260477. The next prime is 20260511. The reversal of 20260506 is 60506202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241155 + ... + 241238.

It is an arithmetic number, because the mean of its divisors is an integer number (2894364).

Almost surely, 2^20260506 is an apocalyptic number.

20260506 is an abundant number, since it is smaller than the sum of its proper divisors (26049318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20260506 is a wasteful number, since it uses less digits than its factorization.

20260506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482405.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20260506 is about 4501.1671819651. The cubic root of 20260506 is about 272.6152182295.

Adding to 20260506 its reverse (60506202), we get a palindrome (80766708).

The spelling of 20260506 in words is "twenty million, two hundred sixty thousand, five hundred six".