20842003 has 12 divisors (see below), whose sum is σ = 26110560. Its totient is φ = 16489872.

The previous prime is 20841973. The next prime is 20842007. The reversal of 20842003 is 30024802.

It is a happy number.

It is not a de Polignac number, because 20842003 - 2¹³ = 20833811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20842007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15723 + ... + 16996.

It is an arithmetic number, because the mean of its divisors is an integer number (2175880).

Almost surely, 2^20842003 is an apocalyptic number.

20842003 is a deficient number, since it is larger than the sum of its proper divisors (5268557).

20842003 is a wasteful number, since it uses less digits than its factorization.

20842003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32746 (or 32739 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20842003 is about 4565.3042614923. The cubic root of 20842003 is about 275.1987675927.

Adding to 20842003 its reverse (30024802), we get a palindrome (50866805).

The spelling of 20842003 in words is "twenty million, eight hundred forty-two thousand, three".