21384387203 has 8 divisors (see below), whose sum is σ = 21686604576. Its totient is φ = 21082420800.

The previous prime is 21384387187. The next prime is 21384387229. The reversal of 21384387203 is 30278348312.

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 21384387203 - 2⁴ = 21384387187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21384387293) 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, 112298 + ... + 235328.

It is an arithmetic number, because the mean of its divisors is an integer number (2710825572).

Almost surely, 2^21384387203 is an apocalyptic number.

21384387203 is a deficient number, since it is larger than the sum of its proper divisors (302217373).

21384387203 is a wasteful number, since it uses less digits than its factorization.

21384387203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125485.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 21384387203 in words is "twenty-one billion, three hundred eighty-four million, three hundred eighty-seven thousand, two hundred three".