21480994123 has 8 divisors (see below), whose sum is σ = 21995041536. Its totient is φ = 20972821800.

The previous prime is 21480994121. The next prime is 21480994177. The reversal of 21480994123 is 32149908412.

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 21480994123 - 2¹ = 21480994121 is a prime.

It is a super-2 number, since 2×21480994123² (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 21480994123.

It is not an unprimeable number, because it can be changed into a prime (21480994121) 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, 1461373 + ... + 1475998.

It is an arithmetic number, because the mean of its divisors is an integer number (2749380192).

Almost surely, 2^21480994123 is an apocalyptic number.

21480994123 is a deficient number, since it is larger than the sum of its proper divisors (514047413).

21480994123 is a wasteful number, since it uses less digits than its factorization.

21480994123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937545.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 21480994123 in words is "twenty-one billion, four hundred eighty million, nine hundred ninety-four thousand, one hundred twenty-three".