21459009143 has 12 divisors (see below), whose sum is σ = 25401575304. Its totient is φ = 18007558800.

The previous prime is 21459009097. The next prime is 21459009163. The reversal of 21459009143 is 34190095412.

It is not a de Polignac number, because 21459009143 - 2⁶ = 21459009079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21459009097 and 21459009106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21459009163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6819473 + ... + 6822618.

It is an arithmetic number, because the mean of its divisors is an integer number (2116797942).

Almost surely, 2^21459009143 is an apocalyptic number.

21459009143 is a deficient number, since it is larger than the sum of its proper divisors (3942566161).

21459009143 is a wasteful number, since it uses less digits than its factorization.

21459009143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13642126 (or 13642115 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 21459009143 in words is "twenty-one billion, four hundred fifty-nine million, nine thousand, one hundred forty-three".