20103031 has 4 divisors (see below), whose sum is σ = 21649432. Its totient is φ = 18556632.

The previous prime is 20102983. The next prime is 20103047. The reversal of 20103031 is 13030102.

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

It is a cyclic number.

It is not a de Polignac number, because 20103031 - 2⁷ = 20102903 is a prime.

It is a super-2 number, since 2×20103031² = 808263710773922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102999 and 20103017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773181 + ... + 773206.

It is an arithmetic number, because the mean of its divisors is an integer number (5412358).

Almost surely, 2^20103031 is an apocalyptic number.

20103031 is a deficient number, since it is larger than the sum of its proper divisors (1546401).

20103031 is a wasteful number, since it uses less digits than its factorization.

20103031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546400.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 20103031 is about 4483.6403736250. The cubic root of 20103031 is about 271.9070788061.

Adding to 20103031 its reverse (13030102), we get a palindrome (33133133).

It can be divided in two parts, 2010 and 3031, that added together give a square (5041 = 71²).

The spelling of 20103031 in words is "twenty million, one hundred three thousand, thirty-one".