20620506 has 16 divisors (see below), whose sum is σ = 41457024. Its totient is φ = 6837504.

The previous prime is 20620493. The next prime is 20620513. The reversal of 20620506 is 60502602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7746 + ... + 10061.

It is an arithmetic number, because the mean of its divisors is an integer number (2591064).

Almost surely, 2^20620506 is an apocalyptic number.

20620506 is an abundant number, since it is smaller than the sum of its proper divisors (20836518).

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

20620506 is a wasteful number, since it uses less digits than its factorization.

20620506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005.

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

The square root of 20620506 is about 4540.9807310756. The cubic root of 20620506 is about 274.2204080167.

The spelling of 20620506 in words is "twenty million, six hundred twenty thousand, five hundred six".