20010003 has 16 divisors (see below), whose sum is σ = 30423456. Its totient is φ = 11589120.

The previous prime is 20009999. The next prime is 20010017. The reversal of 20010003 is 30001002.

It is not a de Polignac number, because 20010003 - 2² = 20009999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20009973 and 20010000.

It is not an unprimeable number, because it can be changed into a prime (20010073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14428 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (1901466).

Almost surely, 2^20010003 is an apocalyptic number.

20010003 is a deficient number, since it is larger than the sum of its proper divisors (10413453).

20010003 is a wasteful number, since it uses less digits than its factorization.

20010003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30214.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 20010003 is about 4473.2541845954. The cubic root of 20010003 is about 271.4870079827.

Adding to 20010003 its reverse (30001002), we get a palindrome (50011005).

Subtracting 20010003 from its reverse (30001002), we obtain a palindrome (9990999).

The spelling of 20010003 in words is "twenty million, ten thousand, three".