20417898384 has 120 divisors (see below), whose sum is σ = 62456127552. Its totient is φ = 6188624640.

The previous prime is 20417898383. The next prime is 20417898407. The reversal of 20417898384 is 48389871402.

It is a happy number.

20417898384 is a `hidden beast` number, since 2 + 0 + 4 + 178 + 98 + 384 = 666.

It is a super-2 number, since 2×20417898384² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20417898384.

It is not an unprimeable number, because it can be changed into a prime (20417898383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44029 + ... + 206819.

Almost surely, 2^20417898384 is an apocalyptic number.

20417898384 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 20417898384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31228063776).

20417898384 is an abundant number, since it is smaller than the sum of its proper divisors (42038229168).

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

20417898384 is a wasteful number, since it uses less digits than its factorization.

20417898384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162885 (or 162876 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 20417898384 in words is "twenty billion, four hundred seventeen million, eight hundred ninety-eight thousand, three hundred eighty-four".