21600060 has 48 divisors (see below), whose sum is σ = 60891936. Its totient is φ = 5720832.

The previous prime is 21600037. The next prime is 21600091. The reversal of 21600060 is 6000612.

It is a super-3 number, since 3×21600060³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8274 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (1268582).

Almost surely, 2^21600060 is an apocalyptic number.

21600060 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 21600060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30445968).

21600060 is an abundant number, since it is smaller than the sum of its proper divisors (39291876).

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

21600060 is a wasteful number, since it uses less digits than its factorization.

21600060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462 (or 2460 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21600060 is about 4647.5864704167. The cubic root of 21600060 is about 278.4955878826.

Adding to 21600060 its reverse (6000612), we get a palindrome (27600672).

It can be divided in two parts, 216000 and 60, that multiplied together give a 4-th power (12960000 = 60⁴).

The spelling of 21600060 in words is "twenty-one million, six hundred thousand, sixty".