20102103 has 36 divisors (see below), whose sum is σ = 34263840. Its totient is φ = 11321856.

The previous prime is 20102099. The next prime is 20102111. The reversal of 20102103 is 30120102.

It is a happy number.

It is not a de Polignac number, because 20102103 - 2² = 20102099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102153) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34551 + ... + 35127.

Almost surely, 2^20102103 is an apocalyptic number.

20102103 is a deficient number, since it is larger than the sum of its proper divisors (14161737).

20102103 is a wasteful number, since it uses less digits than its factorization.

20102103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20102103 is about 4483.5368850942. The cubic root of 20102103 is about 271.9028947994.

Adding to 20102103 its reverse (30120102), we get a palindrome (50222205).

The spelling of 20102103 in words is "twenty million, one hundred two thousand, one hundred three".