21459009142 has 8 divisors (see below), whose sum is σ = 32201289432. Its totient is φ = 10725246000.

The previous prime is 21459009097. The next prime is 21459009163. The reversal of 21459009142 is 24190095412.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2122984 + ... + 2133067.

It is an arithmetic number, because the mean of its divisors is an integer number (4025161179).

Almost surely, 2^21459009142 is an apocalyptic number.

21459009142 is a deficient number, since it is larger than the sum of its proper divisors (10742280290).

21459009142 is a wasteful number, since it uses less digits than its factorization.

21459009142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258574.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 21459009142 in words is "twenty-one billion, four hundred fifty-nine million, nine thousand, one hundred forty-two".