20945746 has 8 divisors (see below), whose sum is σ = 31454640. Its totient is φ = 10460868.

The previous prime is 20945731. The next prime is 20945747. The reversal of 20945746 is 64754902.

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

It is not an unprimeable number, because it can be changed into a prime (20945747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3636 + ... + 7423.

It is an arithmetic number, because the mean of its divisors is an integer number (3931830).

Almost surely, 2^20945746 is an apocalyptic number.

20945746 is a deficient number, since it is larger than the sum of its proper divisors (10508894).

20945746 is a wasteful number, since it uses less digits than its factorization.

20945746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12008.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 20945746 is about 4576.6522699458. The cubic root of 20945746 is about 275.6546211929.

The spelling of 20945746 in words is "twenty million, nine hundred forty-five thousand, seven hundred forty-six".