20506606 has 12 divisors (see below), whose sum is σ = 31080672. Its totient is φ = 10147464.

The previous prime is 20506597. The next prime is 20506631. The reversal of 20506606 is 60660502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23331 + ... + 24193.

It is an arithmetic number, because the mean of its divisors is an integer number (2590056).

Almost surely, 2^20506606 is an apocalyptic number.

20506606 is a deficient number, since it is larger than the sum of its proper divisors (10574066).

20506606 is an equidigital number, since it uses as much as digits as its factorization.

20506606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20506606 is about 4528.4220209693. The cubic root of 20506606 is about 273.7145783766.

It can be divided in two parts, 20506 and 606, that added together give a palindrome (21112).

The spelling of 20506606 in words is "twenty million, five hundred six thousand, six hundred six".