21650098384660 has 96 divisors (see below), whose sum is σ = 48829879752192. Its totient is φ = 8042151237120.

The previous prime is 21650098384657. The next prime is 21650098384721. The reversal of 21650098384660 is 6648389005612.

It is a junction number, because it is equal to n+sod(n) for n = 21650098384595 and 21650098384604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6466569 + ... + 9225871.

It is an arithmetic number, because the mean of its divisors is an integer number (508644580752).

Almost surely, 2^{21650098384660} is an apocalyptic number.

21650098384660 is a gapful number since it is divisible by the number (20) 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 21650098384660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24414939876096).

21650098384660 is an abundant number, since it is smaller than the sum of its proper divisors (27179781367532).

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

21650098384660 is a wasteful number, since it uses less digits than its factorization.

21650098384660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759833 (or 2759831 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 21650098384660 in words is "twenty-one trillion, six hundred fifty billion, ninety-eight million, three hundred eighty-four thousand, six hundred sixty".