20284181984 has 48 divisors (see below), whose sum is σ = 44178535296. Its totient is φ = 9090211200.

The previous prime is 20284181977. The next prime is 20284182031. The reversal of 20284181984 is 48918148202.

It is a super-2 number, since 2×20284181984² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 380822 + ... + 430805.

It is an arithmetic number, because the mean of its divisors is an integer number (920386152).

Almost surely, 2^20284181984 is an apocalyptic number.

It is an amenable number.

20284181984 is an abundant number, since it is smaller than the sum of its proper divisors (23894353312).

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

20284181984 is a wasteful number, since it uses less digits than its factorization.

20284181984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811719 (or 811711 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 20284181984 in words is "twenty billion, two hundred eighty-four million, one hundred eighty-one thousand, nine hundred eighty-four".