21132959 has 8 divisors (see below), whose sum is σ = 22323840. Its totient is φ = 19949976.

The previous prime is 21132953. The next prime is 21132983. The reversal of 21132959 is 95923112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132953) 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, 4022 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (2790480).

Almost surely, 2^21132959 is an apocalyptic number.

21132959 is a deficient number, since it is larger than the sum of its proper divisors (1190881).

21132959 is a wasteful number, since it uses less digits than its factorization.

21132959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its digits is 4860, while the sum is 32.

The square root of 21132959 is about 4597.0598212336. The cubic root of 21132959 is about 276.4734531050.

The spelling of 21132959 in words is "twenty-one million, one hundred thirty-two thousand, nine hundred fifty-nine".