21481029473 has 8 divisors (see below), whose sum is σ = 22880817792. Its totient is φ = 20096374336.

The previous prime is 21481029457. The next prime is 21481029499. The reversal of 21481029473 is 37492018412.

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 21481029473 - 2⁴ = 21481029457 is a prime.

It is a super-2 number, since 2×21481029473² (a number of 21 digits) contains 22 as substring.

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 21481029473.

It is not an unprimeable number, because it can be changed into a prime (21481022473) 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, 3780365 + ... + 3786042.

It is an arithmetic number, because the mean of its divisors is an integer number (2860102224).

Almost surely, 2^21481029473 is an apocalyptic number.

It is an amenable number.

21481029473 is a deficient number, since it is larger than the sum of its proper divisors (1399788319).

21481029473 is a wasteful number, since it uses less digits than its factorization.

21481029473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7566591.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 21481029473 in words is "twenty-one billion, four hundred eighty-one million, twenty-nine thousand, four hundred seventy-three".