21459009136 has 10 divisors (see below), whose sum is σ = 41576830232. Its totient is φ = 10729504560.

The previous prime is 21459009097. The next prime is 21459009163. The reversal of 21459009136 is 63190095412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670594020 + ... + 670594051.

Almost surely, 2^21459009136 is an apocalyptic number.

It is an amenable number.

21459009136 is a deficient number, since it is larger than the sum of its proper divisors (20117821096).

21459009136 is a wasteful number, since it uses less digits than its factorization.

21459009136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341188079 (or 1341188073 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 21459009136 in words is "twenty-one billion, four hundred fifty-nine million, nine thousand, one hundred thirty-six".