21434179 has 8 divisors (see below), whose sum is σ = 23288832. Its totient is φ = 19608960.

The previous prime is 21434177. The next prime is 21434213. The reversal of 21434179 is 97143412.

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 21434179 - 2¹ = 21434177 is a prime.

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 21434179.

It is not an unprimeable number, because it can be changed into a prime (21434173) 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, 5827 + ... + 8764.

It is an arithmetic number, because the mean of its divisors is an integer number (2911104).

Almost surely, 2^21434179 is an apocalyptic number.

21434179 is a deficient number, since it is larger than the sum of its proper divisors (1854653).

21434179 is a wasteful number, since it uses less digits than its factorization.

21434179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14717.

The product of its digits is 6048, while the sum is 31.

The square root of 21434179 is about 4629.7061461825. The cubic root of 21434179 is about 277.7808384315.

The spelling of 21434179 in words is "twenty-one million, four hundred thirty-four thousand, one hundred seventy-nine".