21367080 has 192 divisors, whose sum is σ = 81244800. Its totient is φ = 4769280.

The previous prime is 21367067. The next prime is 21367111. The reversal of 21367080 is 8076312.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153651 + ... + 153789.

It is an arithmetic number, because the mean of its divisors is an integer number (423150).

Almost surely, 2^21367080 is an apocalyptic number.

21367080 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 21367080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40622400).

21367080 is an abundant number, since it is smaller than the sum of its proper divisors (59877720).

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

21367080 is a wasteful number, since it uses less digits than its factorization.

21367080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 21367080 is about 4622.4538937668. The cubic root of 21367080 is about 277.4906741448.

It can be divided in two parts, 2136 and 7080, that added together give a square (9216 = 96²).

The spelling of 21367080 in words is "twenty-one million, three hundred sixty-seven thousand, eighty".