20016215 has 16 divisors (see below), whose sum is σ = 25528800. Its totient is φ = 15023232.

The previous prime is 20016193. The next prime is 20016221. The reversal of 20016215 is 51261002.

It is a cyclic number.

It is not a de Polignac number, because 20016215 - 2¹² = 20012119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20016193 and 20016202.

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 15 ways as a sum of consecutive naturals, for example, 9389 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (1595550).

Almost surely, 2^20016215 is an apocalyptic number.

20016215 is a deficient number, since it is larger than the sum of its proper divisors (5512585).

20016215 is a wasteful number, since it uses less digits than its factorization.

20016215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20016215 is about 4473.9484798106. The cubic root of 20016215 is about 271.5150989797.

Adding to 20016215 its reverse (51261002), we get a palindrome (71277217).

The spelling of 20016215 in words is "twenty million, sixteen thousand, two hundred fifteen".