20947448 has 16 divisors (see below), whose sum is σ = 39482880. Its totient is φ = 10418688.

The previous prime is 20947429. The next prime is 20947469. The reversal of 20947448 is 84474902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240 + ... + 8327.

It is an arithmetic number, because the mean of its divisors is an integer number (2467680).

Almost surely, 2^20947448 is an apocalyptic number.

It is an amenable number.

20947448 is a deficient number, since it is larger than the sum of its proper divisors (18535432).

20947448 is a wasteful number, since it uses less digits than its factorization.

20947448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13766 (or 13762 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 20947448 is about 4576.8382099436. The cubic root of 20947448 is about 275.6620873303.

The spelling of 20947448 in words is "twenty million, nine hundred forty-seven thousand, four hundred forty-eight".