21483480 has 32 divisors (see below), whose sum is σ = 64450800. Its totient is φ = 5728896.

The previous prime is 21483439. The next prime is 21483481. The reversal of 21483480 is 8438412.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89395 + ... + 89634.

Almost surely, 2^21483480 is an apocalyptic number.

21483480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21483480 is an abundant number, since it is smaller than the sum of its proper divisors (42967320).

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

21483480 is a wasteful number, since it uses less digits than its factorization.

21483480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179043 (or 179039 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 21483480 is about 4635.0275080090. The cubic root of 21483480 is about 277.9936509773.

The spelling of 21483480 in words is "twenty-one million, four hundred eighty-three thousand, four hundred eighty".