20151103 has 18 divisors (see below), whose sum is σ = 24918576. Its totient is φ = 16244928.

The previous prime is 20151097. The next prime is 20151127. The reversal of 20151103 is 30115102.

It is not a de Polignac number, because 20151103 - 2⁹ = 20150591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151503) 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 17 ways as a sum of consecutive naturals, for example, 13450 + ... + 14872.

Almost surely, 2^20151103 is an apocalyptic number.

20151103 is a deficient number, since it is larger than the sum of its proper divisors (4767473).

20151103 is a wasteful number, since it uses less digits than its factorization.

20151103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1447 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 20151103 is about 4488.9979950987. The cubic root of 20151103 is about 272.1236417049.

Adding to 20151103 its reverse (30115102), we get a palindrome (50266205).

The spelling of 20151103 in words is "twenty million, one hundred fifty-one thousand, one hundred three".