21929326 has 4 divisors (see below), whose sum is σ = 32893992. Its totient is φ = 10964662.

The previous prime is 21929321. The next prime is 21929339. The reversal of 21929326 is 62392912.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21929291 and 21929300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21929321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5482330 + ... + 5482333.

It is an arithmetic number, because the mean of its divisors is an integer number (8223498).

Almost surely, 2^21929326 is an apocalyptic number.

21929326 is a deficient number, since it is larger than the sum of its proper divisors (10964666).

21929326 is a wasteful number, since it uses less digits than its factorization.

21929326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10964665.

The product of its digits is 11664, while the sum is 34.

The square root of 21929326 is about 4682.8758258147. The cubic root of 21929326 is about 279.9035637285.

The spelling of 21929326 in words is "twenty-one million, nine hundred twenty-nine thousand, three hundred twenty-six".