20431103 has 8 divisors (see below), whose sum is σ = 25472640. Its totient is φ = 15920280.

The previous prime is 20431097. The next prime is 20431121. The reversal of 20431103 is 30113402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431103 - 2⁴ = 20431087 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 (20431123) 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, 132593 + ... + 132746.

It is an arithmetic number, because the mean of its divisors is an integer number (3184080).

Almost surely, 2^20431103 is an apocalyptic number.

20431103 is a deficient number, since it is larger than the sum of its proper divisors (5041537).

20431103 is a wasteful number, since it uses less digits than its factorization.

20431103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265357.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20431103 is about 4520.0777648178. The cubic root of 20431103 is about 273.3782365584.

Adding to 20431103 its reverse (30113402), we get a palindrome (50544505).

The spelling of 20431103 in words is "twenty million, four hundred thirty-one thousand, one hundred three".