20213103 has 4 divisors (see below), whose sum is σ = 26950808. Its totient is φ = 13475400.

The previous prime is 20213099. The next prime is 20213107. The reversal of 20213103 is 30131202.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20213099) and next prime (20213107).

It is not a de Polignac number, because 20213103 - 2² = 20213099 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 (20213107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3368848 + ... + 3368853.

It is an arithmetic number, because the mean of its divisors is an integer number (6737702).

Almost surely, 2^20213103 is an apocalyptic number.

20213103 is a deficient number, since it is larger than the sum of its proper divisors (6737705).

20213103 is an equidigital number, since it uses as much as digits as its factorization.

20213103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737704.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20213103 is about 4495.8984641560. The cubic root of 20213103 is about 272.4024418609.

Adding to 20213103 its reverse (30131202), we get a palindrome (50344305).

The spelling of 20213103 in words is "twenty million, two hundred thirteen thousand, one hundred three".