21482988 has 24 divisors (see below), whose sum is σ = 50222592. Its totient is φ = 7147344.

The previous prime is 21482987. The next prime is 21482999. The reversal of 21482988 is 88928412.

It is not an unprimeable number, because it can be changed into a prime (21482987) 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, 6381 + ... + 9147.

It is an arithmetic number, because the mean of its divisors is an integer number (2092608).

Almost surely, 2^21482988 is an apocalyptic number.

It is an amenable number.

21482988 is an abundant number, since it is smaller than the sum of its proper divisors (28739604).

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

21482988 is a wasteful number, since it uses less digits than its factorization.

21482988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421 (or 3419 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 21482988 is about 4634.9744335864. The cubic root of 21482988 is about 277.9915288208.

The spelling of 21482988 in words is "twenty-one million, four hundred eighty-two thousand, nine hundred eighty-eight".