21667072403 has 8 divisors (see below), whose sum is σ = 21967033200. Its totient is φ = 21367196928.

The previous prime is 21667072393. The next prime is 21667072459. The reversal of 21667072403 is 30427076612.

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 21667072403 - 2¹⁰ = 21667071379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21667072463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623963 + ... + 657771.

It is an arithmetic number, because the mean of its divisors is an integer number (2745879150).

Almost surely, 2^21667072403 is an apocalyptic number.

21667072403 is a deficient number, since it is larger than the sum of its proper divisors (299960797).

21667072403 is an equidigital number, since it uses as much as digits as its factorization.

21667072403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42661.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 21667072403 in words is "twenty-one billion, six hundred sixty-seven million, seventy-two thousand, four hundred three".