20284248 has 32 divisors (see below), whose sum is σ = 53380800. Its totient is φ = 6405408.

The previous prime is 20284223. The next prime is 20284249. The reversal of 20284248 is 84248202.

It is a super-2 number, since 2×20284248² = 822901433851008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20284249) by changing a digit.

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, 21786 + ... + 22697.

It is an arithmetic number, because the mean of its divisors is an integer number (1668150).

Almost surely, 2^20284248 is an apocalyptic number.

It is an amenable number.

20284248 is an abundant number, since it is smaller than the sum of its proper divisors (33096552).

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

20284248 is a wasteful number, since it uses less digits than its factorization.

20284248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44511 (or 44507 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 20284248 is about 4503.8037257412. The cubic root of 20284248 is about 272.7216634806.

The spelling of 20284248 in words is "twenty million, two hundred eighty-four thousand, two hundred forty-eight".