20102113 has 4 divisors (see below), whose sum is σ = 20569648. Its totient is φ = 19634580.

The previous prime is 20102111. The next prime is 20102119. The reversal of 20102113 is 31120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20102113 - 2¹ = 20102111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102113.

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 3 ways as a sum of consecutive naturals, for example, 233703 + ... + 233788.

It is an arithmetic number, because the mean of its divisors is an integer number (5142412).

Almost surely, 2^20102113 is an apocalyptic number.

It is an amenable number.

20102113 is a deficient number, since it is larger than the sum of its proper divisors (467535).

20102113 is an equidigital number, since it uses as much as digits as its factorization.

20102113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467534.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20102113 is about 4483.5380002850. The cubic root of 20102113 is about 271.9029398863.

Adding to 20102113 its reverse (31120102), we get a palindrome (51222215).

The spelling of 20102113 in words is "twenty million, one hundred two thousand, one hundred thirteen".