21482637 has 16 divisors (see below), whose sum is σ = 31418688. Its totient is φ = 12948480.

The previous prime is 21482633. The next prime is 21482663. The reversal of 21482637 is 73628412.

It is not a de Polignac number, because 21482637 - 2² = 21482633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21482598 and 21482607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21482633) 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 15 ways as a sum of consecutive naturals, for example, 4683 + ... + 8055.

It is an arithmetic number, because the mean of its divisors is an integer number (1963668).

Almost surely, 2^21482637 is an apocalyptic number.

It is an amenable number.

21482637 is a deficient number, since it is larger than the sum of its proper divisors (9936051).

21482637 is a wasteful number, since it uses less digits than its factorization.

21482637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580.

The product of its digits is 16128, while the sum is 33.

The square root of 21482637 is about 4634.9365691453. The cubic root of 21482637 is about 277.9900148235.

The spelling of 21482637 in words is "twenty-one million, four hundred eighty-two thousand, six hundred thirty-seven".