20904326 has 8 divisors (see below), whose sum is σ = 31379400. Its totient is φ = 10444528.

The previous prime is 20904319. The next prime is 20904337. The reversal of 20904326 is 62340902.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20904295 and 20904304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650 + ... + 6498.

It is an arithmetic number, because the mean of its divisors is an integer number (3922425).

Almost surely, 2^20904326 is an apocalyptic number.

20904326 is a deficient number, since it is larger than the sum of its proper divisors (10475074).

20904326 is a wasteful number, since it uses less digits than its factorization.

20904326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20904326 is about 4572.1248889329. The cubic root of 20904326 is about 275.4727998855.

The spelling of 20904326 in words is "twenty million, nine hundred four thousand, three hundred twenty-six".