20012103 has 20 divisors (see below), whose sum is σ = 30187080. Its totient is φ = 13210992.

The previous prime is 20012101. The next prime is 20012119. The reversal of 20012103 is 30121002.

It is a happy number.

It is not a de Polignac number, because 20012103 - 2¹ = 20012101 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 (20012101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7513 + ... + 9821.

It is an arithmetic number, because the mean of its divisors is an integer number (1509354).

Almost surely, 2^20012103 is an apocalyptic number.

20012103 is a deficient number, since it is larger than the sum of its proper divisors (10174977).

20012103 is a wasteful number, since it uses less digits than its factorization.

20012103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 2419 counting only the distinct ones).

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

The square root of 20012103 is about 4473.4889068824. The cubic root of 20012103 is about 271.4965049457.

Adding to 20012103 its reverse (30121002), we get a palindrome (50133105).

The spelling of 20012103 in words is "twenty million, twelve thousand, one hundred three".