20022003 has 6 divisors (see below), whose sum is σ = 28920684. Its totient is φ = 13347996.

The previous prime is 20021999. The next prime is 20022011. The reversal of 20022003 is 30022002.

It is not a de Polignac number, because 20022003 - 2² = 20021999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2224667 = 20022003 / (2 + 0 + 0 + 2 + 2 + 0 + 0 + 3).

It is not an unprimeable number, because it can be changed into a prime (20022043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112325 + ... + 1112342.

It is an arithmetic number, because the mean of its divisors is an integer number (4820114).

Almost surely, 2^20022003 is an apocalyptic number.

20022003 is a deficient number, since it is larger than the sum of its proper divisors (8898681).

20022003 is a wasteful number, since it uses less digits than its factorization.

20022003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224673 (or 2224670 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 20022003 is about 4474.5952889619. The cubic root of 20022003 is about 271.5412673960.

Adding to 20022003 its reverse (30022002), we get a palindrome (50044005).

Subtracting 20022003 from its reverse (30022002), we obtain a palindrome (9999999).

It can be divided in two parts, 2002 and 2003, that added together give a triangular number (4005 = T₈₉).

The spelling of 20022003 in words is "twenty million, twenty-two thousand, three".