21480108 has 48 divisors (see below), whose sum is σ = 56824320. Its totient is φ = 6260544.

The previous prime is 21480101. The next prime is 21480131. The reversal of 21480108 is 80108412.

It is a super-2 number, since 2×21480108² = 922790079383328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21480101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660 + ... + 6587.

It is an arithmetic number, because the mean of its divisors is an integer number (1183840).

Almost surely, 2^21480108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21480108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28412160).

21480108 is an abundant number, since it is smaller than the sum of its proper divisors (35344212).

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

21480108 is a wasteful number, since it uses less digits than its factorization.

21480108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286 (or 7284 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 21480108 is about 4634.6637418479. The cubic root of 21480108 is about 277.9791057912.

The spelling of 21480108 in words is "twenty-one million, four hundred eighty thousand, one hundred eight".