20102 has 12 divisors (see below), whose sum is σ = 33180. Its totient is φ = 9108.

The previous prime is 20101. The next prime is 20107.

20102 is nontrivially palindromic in base 10.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 863 + ... + 885.

It is an arithmetic number, because the mean of its divisors is an integer number (2765).

2²⁰¹⁰² is an apocalyptic number.

20102 is a deficient number, since it is larger than the sum of its proper divisors (13078).

20102 is a wasteful number, since it uses less digits than its factorization.

20102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 20102 is about 141.7815220683. The cubic root of 20102 is about 27.1902430403.

The spelling of 20102 in words is "twenty thousand, one hundred two", and thus it is an iban number.