20868003 has 16 divisors (see below), whose sum is σ = 33294240. Its totient is φ = 12841632.

The previous prime is 20867989. The next prime is 20868007. The reversal of 20868003 is 30086802.

It is not a de Polignac number, because 20868003 - 2⁵ = 20867971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20868007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29376 + ... + 30077.

It is an arithmetic number, because the mean of its divisors is an integer number (2080890).

Almost surely, 2^20868003 is an apocalyptic number.

20868003 is a deficient number, since it is larger than the sum of its proper divisors (12426237).

20868003 is a wasteful number, since it uses less digits than its factorization.

20868003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59475 (or 59469 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20868003 is about 4568.1509388373. The cubic root of 20868003 is about 275.3131551063.

The spelling of 20868003 in words is "twenty million, eight hundred sixty-eight thousand, three".