20946655 has 8 divisors (see below), whose sum is σ = 25210512. Its totient is φ = 16707648.

The previous prime is 20946649. The next prime is 20946661. The reversal of 20946655 is 55664902.

It is an interprime number because it is at equal distance from previous prime (20946649) and next prime (20946661).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20946655 - 2¹¹ = 20944607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4302 + ... + 7771.

It is an arithmetic number, because the mean of its divisors is an integer number (3151314).

Almost surely, 2^20946655 is an apocalyptic number.

20946655 is a deficient number, since it is larger than the sum of its proper divisors (4263857).

20946655 is a wasteful number, since it uses less digits than its factorization.

20946655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12425.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 20946655 is about 4576.7515772653. The cubic root of 20946655 is about 275.6586087396.

It can be divided in two parts, 209 and 46655, that added together give a palindrome (46864).

The spelling of 20946655 in words is "twenty million, nine hundred forty-six thousand, six hundred fifty-five".