20747008 has 18 divisors (see below), whose sum is σ = 41413484. Its totient is φ = 10373376.

The previous prime is 20746963. The next prime is 20747011. The reversal of 20747008 is 80074702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40266 + ... + 40777.

Almost surely, 2^20747008 is an apocalyptic number.

It is an amenable number.

20747008 is a deficient number, since it is larger than the sum of its proper divisors (20666476).

20747008 is an frugal number, since it uses more digits than its factorization.

20747008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81059 (or 81045 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 20747008 is about 4554.8883630667. Note that the first 3 decimals coincide. The cubic root of 20747008 is about 274.7800246373.

The spelling of 20747008 in words is "twenty million, seven hundred forty-seven thousand, eight".