21035326860 has 192 divisors, whose sum is σ = 66066739200. Its totient is φ = 5556294144.

The previous prime is 21035326849. The next prime is 21035326927. The reversal of 21035326860 is 6862353012.

It is a happy number.

21035326860 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 532 + 68 + 60 = 666.

It is a super-2 number, since 2×21035326860² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36968656 + ... + 36969224.

It is an arithmetic number, because the mean of its divisors is an integer number (344097600).

Almost surely, 2^21035326860 is an apocalyptic number.

21035326860 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 21035326860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33033369600).

21035326860 is an abundant number, since it is smaller than the sum of its proper divisors (45031412340).

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

21035326860 is a wasteful number, since it uses less digits than its factorization.

21035326860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 21035326860 its reverse (6862353012), we get a palindrome (27897679872).

The spelling of 21035326860 in words is "twenty-one billion, thirty-five million, three hundred twenty-six thousand, eight hundred sixty".