21362080 has 48 divisors (see below), whose sum is σ = 53131680. Its totient is φ = 8093952.

The previous prime is 21362057. The next prime is 21362113. The reversal of 21362080 is 8026312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (1106910).

Almost surely, 2^21362080 is an apocalyptic number.

21362080 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 21362080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26565840).

21362080 is an abundant number, since it is smaller than the sum of its proper divisors (31769600).

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

21362080 is a wasteful number, since it uses less digits than its factorization.

21362080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061 (or 7053 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21362080 is about 4621.9130238463. The cubic root of 21362080 is about 277.4690277366.

Adding to 21362080 its reverse (8026312), we get a palindrome (29388392).

The spelling of 21362080 in words is "twenty-one million, three hundred sixty-two thousand, eighty".