20655606 has 16 divisors (see below), whose sum is σ = 41400000. Its totient is φ = 6870408.

The previous prime is 20655563. The next prime is 20655619. The reversal of 20655606 is 60655602.

It is a congruent number.

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, 456 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (2587500).

Almost surely, 2^20655606 is an apocalyptic number.

20655606 is an abundant number, since it is smaller than the sum of its proper divisors (20744394).

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

20655606 is a wasteful number, since it uses less digits than its factorization.

20655606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20655606 is about 4544.8438917085. The cubic root of 20655606 is about 274.3759114787.

The spelling of 20655606 in words is "twenty million, six hundred fifty-five thousand, six hundred six".