21359060 has 24 divisors (see below), whose sum is σ = 45001320. Its totient is φ = 8515584.

The previous prime is 21359057. The next prime is 21359069. The reversal of 21359060 is 6095312.

It can be written as a sum of positive squares in 4 ways, for example, as 2937796 + 18421264 = 1714^2 + 4292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21359069) by changing a digit.

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, 5156 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (1875055).

Almost surely, 2^21359060 is an apocalyptic number.

21359060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21359060 is an abundant number, since it is smaller than the sum of its proper divisors (23642260).

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

21359060 is a wasteful number, since it uses less digits than its factorization.

21359060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515 (or 3513 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 21359060 is about 4621.5863077519. The cubic root of 21359060 is about 277.4559516698.

The spelling of 21359060 in words is "twenty-one million, three hundred fifty-nine thousand, sixty".