20647248 has 40 divisors (see below), whose sum is σ = 56478528. Its totient is φ = 6477312.

The previous prime is 20647229. The next prime is 20647273. The reversal of 20647248 is 84274602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11836 + ... + 13467.

Almost surely, 2^20647248 is an apocalyptic number.

It is an amenable number.

20647248 is an abundant number, since it is smaller than the sum of its proper divisors (35831280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20647248 is a wasteful number, since it uses less digits than its factorization.

20647248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331 (or 25325 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 20647248 is about 4543.9242951440. The cubic root of 20647248 is about 274.3388990369.

The spelling of 20647248 in words is "twenty million, six hundred forty-seven thousand, two hundred forty-eight".