20102103013 has 4 divisors (see below), whose sum is σ = 20174674060. Its totient is φ = 20029531968.

The previous prime is 20102102989. The next prime is 20102103019. The reversal of 20102103013 is 31030120102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11164669569 + 8937433444 = 105663^2 + 94538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102103013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102102984 and 20102103002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102103019) 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, 36285108 + ... + 36285661.

It is an arithmetic number, because the mean of its divisors is an integer number (5043668515).

Almost surely, 2^20102103013 is an apocalyptic number.

It is an amenable number.

20102103013 is a deficient number, since it is larger than the sum of its proper divisors (72571047).

20102103013 is an equidigital number, since it uses as much as digits as its factorization.

20102103013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72571046.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20102103013 its reverse (31030120102), we get a palindrome (51132223115).

The spelling of 20102103013 in words is "twenty billion, one hundred two million, one hundred three thousand, thirteen".