21300004066 has 8 divisors (see below), whose sum is σ = 34854552144. Its totient is φ = 9681820020.

The previous prime is 21300004007. The next prime is 21300004091. The reversal of 21300004066 is 66040000312.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 968182003 = 21300004066 / (2 + 1 + 3 + 0 + 0 + 0 + 0 + 4 + 0 + 6 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484090980 + ... + 484091023.

It is an arithmetic number, because the mean of its divisors is an integer number (4356819018).

Almost surely, 2^21300004066 is an apocalyptic number.

21300004066 is a deficient number, since it is larger than the sum of its proper divisors (13554548078).

21300004066 is a wasteful number, since it uses less digits than its factorization.

21300004066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968182016.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21300004066 its reverse (66040000312), we get a palindrome (87340004378).

The spelling of 21300004066 in words is "twenty-one billion, three hundred million, four thousand, sixty-six".