20016655 has 8 divisors (see below), whose sum is σ = 24054912. Its totient is φ = 15990048.

The previous prime is 20016649. The next prime is 20016677. The reversal of 20016655 is 55661002.

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 20016655 - 2²³ = 11628047 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1474 + ... + 6496.

It is an arithmetic number, because the mean of its divisors is an integer number (3006864).

Almost surely, 2^20016655 is an apocalyptic number.

20016655 is a deficient number, since it is larger than the sum of its proper divisors (4038257).

20016655 is an equidigital number, since it uses as much as digits as its factorization.

20016655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20016655 is about 4473.9976531062. The cubic root of 20016655 is about 271.5170884629.

Adding to 20016655 its reverse (55661002), we get a palindrome (75677657).

The spelling of 20016655 in words is "twenty million, sixteen thousand, six hundred fifty-five".