20864003 has 8 divisors (see below), whose sum is σ = 21189600. Its totient is φ = 20540608.

The previous prime is 20863991. The next prime is 20864009. The reversal of 20864003 is 30046802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20864003 - 2⁶ = 20863939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20864003.

It is not an unprimeable number, because it can be changed into a prime (20864009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31625 + ... + 32277.

It is an arithmetic number, because the mean of its divisors is an integer number (2648700).

Almost surely, 2^20864003 is an apocalyptic number.

20864003 is a deficient number, since it is larger than the sum of its proper divisors (325597).

20864003 is an equidigital number, since it uses as much as digits as its factorization.

20864003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20864003 is about 4567.7131039504. The cubic root of 20864003 is about 275.2955632139.

The spelling of 20864003 in words is "twenty million, eight hundred sixty-four thousand, three".