20940306 has 8 divisors (see below), whose sum is σ = 41880624. Its totient is φ = 6980100.

The previous prime is 20940289. The next prime is 20940329. The reversal of 20940306 is 60304902.

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

20940306 is an admirable number.

It is a Curzon 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, 1745020 + ... + 1745031.

It is an arithmetic number, because the mean of its divisors is an integer number (5235078).

Almost surely, 2^20940306 is an apocalyptic number.

20940306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20940306 is a wasteful number, since it uses less digits than its factorization.

20940306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490056.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20940306 is about 4576.0579104727. The cubic root of 20940306 is about 275.6307549150.

The spelling of 20940306 in words is "twenty million, nine hundred forty thousand, three hundred six".