20447116 has 12 divisors (see below), whose sum is σ = 37665880. Its totient is φ = 9685440.

The previous prime is 20447111. The next prime is 20447131. The reversal of 20447116 is 61174402.

It is not an unprimeable number, because it can be changed into a prime (20447111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134445 + ... + 134596.

Almost surely, 2^20447116 is an apocalyptic number.

It is an amenable number.

20447116 is a deficient number, since it is larger than the sum of its proper divisors (17218764).

20447116 is a wasteful number, since it uses less digits than its factorization.

20447116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269064 (or 269062 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20447116 is about 4521.8487369659. The cubic root of 20447116 is about 273.4496385207.

The spelling of 20447116 in words is "twenty million, four hundred forty-seven thousand, one hundred sixteen".