20974336 has 18 divisors (see below), whose sum is σ = 41867252. Its totient is φ = 10487040.

The previous prime is 20974333. The next prime is 20974357. The reversal of 20974336 is 63347902.

It is not an unprimeable number, because it can be changed into a prime (20974333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40710 + ... + 41221.

Almost surely, 2^20974336 is an apocalyptic number.

It is an amenable number.

20974336 is a deficient number, since it is larger than the sum of its proper divisors (20892916).

20974336 is an frugal number, since it uses more digits than its factorization.

20974336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81947 (or 81933 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20974336 is about 4579.7746669460. The cubic root of 20974336 is about 275.7799828871.

The spelling of 20974336 in words is "twenty million, nine hundred seventy-four thousand, three hundred thirty-six".