21466740803 has 4 divisors (see below), whose sum is σ = 22729490280. Its totient is φ = 20203991328.

The previous prime is 21466740791. The next prime is 21466740809. The reversal of 21466740803 is 30804766412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21466740803 - 2¹⁶ = 21466675267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21466740809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631374713 + ... + 631374746.

It is an arithmetic number, because the mean of its divisors is an integer number (5682372570).

Almost surely, 2^21466740803 is an apocalyptic number.

21466740803 is a deficient number, since it is larger than the sum of its proper divisors (1262749477).

21466740803 is a wasteful number, since it uses less digits than its factorization.

21466740803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262749476.

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

The spelling of 21466740803 in words is "twenty-one billion, four hundred sixty-six million, seven hundred forty thousand, eight hundred three".