20102115 has 32 divisors (see below), whose sum is σ = 36619776. Its totient is φ = 9320960.

The previous prime is 20102111. The next prime is 20102119. The reversal of 20102115 is 51120102.

It is an interprime number because it is at equal distance from previous prime (20102111) and next prime (20102119).

It is not a de Polignac number, because 20102115 - 2² = 20102111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20102115.

It is not an unprimeable number, because it can be changed into a prime (20102111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1147 + ... + 6443.

It is an arithmetic number, because the mean of its divisors is an integer number (1144368).

Almost surely, 2^20102115 is an apocalyptic number.

20102115 is a deficient number, since it is larger than the sum of its proper divisors (16517661).

20102115 is a wasteful number, since it uses less digits than its factorization.

20102115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 20102115 is about 4483.5382233232. The cubic root of 20102115 is about 271.9029489037.

Adding to 20102115 its reverse (51120102), we get a palindrome (71222217).

The spelling of 20102115 in words is "twenty million, one hundred two thousand, one hundred fifteen".