21932079 has 8 divisors (see below), whose sum is σ = 31492272. Its totient is φ = 13496640.

The previous prime is 21932077. The next prime is 21932143. The reversal of 21932079 is 97023912.

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

It is not a de Polignac number, because 21932079 - 2¹ = 21932077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21932077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281142 + ... + 281219.

It is an arithmetic number, because the mean of its divisors is an integer number (3936534).

Almost surely, 2^21932079 is an apocalyptic number.

21932079 is a deficient number, since it is larger than the sum of its proper divisors (9560193).

21932079 is a wasteful number, since it uses less digits than its factorization.

21932079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562377.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 21932079 is about 4683.1697598955. The cubic root of 21932079 is about 279.9152762372.

The spelling of 21932079 in words is "twenty-one million, nine hundred thirty-two thousand, seventy-nine".