21482380 has 24 divisors (see below), whose sum is σ = 46569600. Its totient is φ = 8315520.

The previous prime is 21482371. The next prime is 21482387. The reversal of 21482380 is 8328412.

It is a super-2 number, since 2×21482380² = 922985300928800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21482387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16705 + ... + 17944.

It is an arithmetic number, because the mean of its divisors is an integer number (1940400).

Almost surely, 2^21482380 is an apocalyptic number.

21482380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21482380 is an abundant number, since it is smaller than the sum of its proper divisors (25087220).

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

21482380 is a wasteful number, since it uses less digits than its factorization.

21482380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34689 (or 34687 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 21482380 is about 4634.9088448426. The cubic root of 21482380 is about 277.9889062737.

The spelling of 21482380 in words is "twenty-one million, four hundred eighty-two thousand, three hundred eighty".