20493284 has 24 divisors (see below), whose sum is σ = 41942208. Its totient is φ = 8578080.

The previous prime is 20493271. The next prime is 20493293. The reversal of 20493284 is 48239402.

It is a self number, because there is not a number n which added to its sum of digits gives 20493284.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7307 + ... + 9714.

It is an arithmetic number, because the mean of its divisors is an integer number (1747592).

Almost surely, 2^20493284 is an apocalyptic number.

It is an amenable number.

20493284 is an abundant number, since it is smaller than the sum of its proper divisors (21448924).

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

20493284 is a wasteful number, since it uses less digits than its factorization.

20493284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17075 (or 17073 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20493284 is about 4526.9508501860. The cubic root of 20493284 is about 273.6552931634.

The spelling of 20493284 in words is "twenty million, four hundred ninety-three thousand, two hundred eighty-four".