20100020103 has 8 divisors (see below), whose sum is σ = 29777807600. Its totient is φ = 13400013384.

The previous prime is 20100020099. The next prime is 20100020117. The reversal of 20100020103 is 30102000102.

It is a happy number.

It is not a de Polignac number, because 20100020103 - 2² = 20100020099 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100020153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372222568 + ... + 372222621.

It is an arithmetic number, because the mean of its divisors is an integer number (3722225950).

Almost surely, 2^20100020103 is an apocalyptic number.

20100020103 is a deficient number, since it is larger than the sum of its proper divisors (9677787497).

20100020103 is an equidigital number, since it uses as much as digits as its factorization.

20100020103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744445198 (or 744445192 counting only the distinct ones).

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

Adding to 20100020103 its reverse (30102000102), we get a palindrome (50202020205).

The spelling of 20100020103 in words is "twenty billion, one hundred million, twenty thousand, one hundred three".