20689941384 has 192 divisors, whose sum is σ = 66718080000. Its totient is φ = 5667770880.

The previous prime is 20689941379. The next prime is 20689941403. The reversal of 20689941384 is 48314998602.

20689941384 is a `hidden beast` number, since 2 + 0 + 68 + 99 + 413 + 84 = 666.

It is a super-3 number, since 3×20689941384³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20689941384.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1696942 + ... + 1709090.

It is an arithmetic number, because the mean of its divisors is an integer number (347490000).

Almost surely, 2^20689941384 is an apocalyptic number.

20689941384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20689941384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33359040000).

20689941384 is an abundant number, since it is smaller than the sum of its proper divisors (46028138616).

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

20689941384 is a wasteful number, since it uses less digits than its factorization.

20689941384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12308 (or 12301 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 20689941384 in words is "twenty billion, six hundred eighty-nine million, nine hundred forty-one thousand, three hundred eighty-four".