20213003 has 4 divisors (see below), whose sum is σ = 20226600. Its totient is φ = 20199408.

The previous prime is 20212991. The next prime is 20213047. The reversal of 20213003 is 30031202.

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 20213003 - 2⁸ = 20212747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213503) 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, 4250 + ... + 7647.

It is an arithmetic number, because the mean of its divisors is an integer number (5056650).

Almost surely, 2^20213003 is an apocalyptic number.

20213003 is a deficient number, since it is larger than the sum of its proper divisors (13597).

20213003 is a wasteful number, since it uses less digits than its factorization.

20213003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20213003 is about 4495.8873428946. The cubic root of 20213003 is about 272.4019926426.

Adding to 20213003 its reverse (30031202), we get a palindrome (50244205).

The spelling of 20213003 in words is "twenty million, two hundred thirteen thousand, three".