21459009129 has 8 divisors (see below), whose sum is σ = 28619022432. Its totient is φ = 14302500960.

The previous prime is 21459009097. The next prime is 21459009163. The reversal of 21459009129 is 92190095412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21459009129 - 2⁵ = 21459009097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21459009529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861964 + ... + 886509.

It is an arithmetic number, because the mean of its divisors is an integer number (3577377804).

Almost surely, 2^21459009129 is an apocalyptic number.

It is an amenable number.

21459009129 is a deficient number, since it is larger than the sum of its proper divisors (7160013303).

21459009129 is a wasteful number, since it uses less digits than its factorization.

21459009129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752567.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 21459009129 in words is "twenty-one billion, four hundred fifty-nine million, nine thousand, one hundred twenty-nine".