20886284 has 12 divisors (see below), whose sum is σ = 36583008. Its totient is φ = 10434000.

The previous prime is 20886269. The next prime is 20886289. The reversal of 20886284 is 48268802.

It is not an unprimeable number, because it can be changed into a prime (20886289) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7709 + ... + 10059.

It is an arithmetic number, because the mean of its divisors is an integer number (3048584).

Almost surely, 2^20886284 is an apocalyptic number.

It is an amenable number.

20886284 is a deficient number, since it is larger than the sum of its proper divisors (15696724).

20886284 is a wasteful number, since it uses less digits than its factorization.

20886284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576 (or 4574 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 20886284 is about 4570.1514198109. The cubic root of 20886284 is about 275.3935258509.

The spelling of 20886284 in words is "twenty million, eight hundred eighty-six thousand, two hundred eighty-four".