20984186284 has 12 divisors (see below), whose sum is σ = 36726127200. Its totient is φ = 10491007088.

The previous prime is 20984186281. The next prime is 20984186287. The reversal of 20984186284 is 48268148902.

It is an interprime number because it is at equal distance from previous prime (20984186281) and next prime (20984186287).

It is a super-2 number, since 2×20984186284² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20984186281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227239 + ... + 305950.

It is an arithmetic number, because the mean of its divisors is an integer number (3060510600).

Almost surely, 2^20984186284 is an apocalyptic number.

It is an amenable number.

20984186284 is a deficient number, since it is larger than the sum of its proper divisors (15741940916).

20984186284 is a wasteful number, since it uses less digits than its factorization.

20984186284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543032 (or 543030 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 52.

The spelling of 20984186284 in words is "twenty billion, nine hundred eighty-four million, one hundred eighty-six thousand, two hundred eighty-four".