20655066 has 16 divisors (see below), whose sum is σ = 41697504. Its totient is φ = 6820464.

The previous prime is 20655049. The next prime is 20655101. The reversal of 20655066 is 66055602.

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, 15445 + ... + 16728.

It is an arithmetic number, because the mean of its divisors is an integer number (2606094).

Almost surely, 2^20655066 is an apocalyptic number.

20655066 is an abundant number, since it is smaller than the sum of its proper divisors (21042438).

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

20655066 is a wasteful number, since it uses less digits than its factorization.

20655066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32285.

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

The square root of 20655066 is about 4544.7844833391. The cubic root of 20655066 is about 274.3735204525.

The spelling of 20655066 in words is "twenty million, six hundred fifty-five thousand, sixty-six".