20973946 has 8 divisors (see below), whose sum is σ = 35955360. Its totient is φ = 8988828.

The previous prime is 20973943. The next prime is 20973959. The reversal of 20973946 is 64937902.

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

It is a junction number, because it is equal to n+sod(n) for n = 20973899 and 20973908.

It is not an unprimeable number, because it can be changed into a prime (20973943) 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, 749056 + ... + 749083.

It is an arithmetic number, because the mean of its divisors is an integer number (4494420).

Almost surely, 2^20973946 is an apocalyptic number.

20973946 is a deficient number, since it is larger than the sum of its proper divisors (14981414).

20973946 is a wasteful number, since it uses less digits than its factorization.

20973946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498148.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20973946 is about 4579.7320882340. The cubic root of 20973946 is about 275.7782735781.

The spelling of 20973946 in words is "twenty million, nine hundred seventy-three thousand, nine hundred forty-six".