20102215 has 16 divisors (see below), whose sum is σ = 27648000. Its totient is φ = 13744800.

The previous prime is 20102213. The next prime is 20102219. The reversal of 20102215 is 51220102.

It is not a de Polignac number, because 20102215 - 2¹ = 20102213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20102195 and 20102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102213) by changing a digit.

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, 16890 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (1728000).

Almost surely, 2^20102215 is an apocalyptic number.

20102215 is a deficient number, since it is larger than the sum of its proper divisors (7545785).

20102215 is a wasteful number, since it uses less digits than its factorization.

20102215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20102215 is about 4483.5493752160. The cubic root of 20102215 is about 271.9033997725.

Adding to 20102215 its reverse (51220102), we get a palindrome (71322317).

It can be divided in two parts, 2010 and 2215, that added together give a square (4225 = 65²).

The spelling of 20102215 in words is "twenty million, one hundred two thousand, two hundred fifteen".