21401482 has 8 divisors (see below), whose sum is σ = 32134500. Its totient is φ = 10689984.

The previous prime is 21401473. The next prime is 21401531. The reversal of 21401482 is 28410412.

It can be written as a sum of positive squares in 2 ways, for example, as 15452761 + 5948721 = 3931^2 + 2439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2607 + ... + 7042.

Almost surely, 2^21401482 is an apocalyptic number.

21401482 is a deficient number, since it is larger than the sum of its proper divisors (10733018).

21401482 is a wasteful number, since it uses less digits than its factorization.

21401482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10760.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 21401482 is about 4626.1735808333. The cubic root of 21401482 is about 277.6395186205.

Adding to 21401482 its reverse (28410412), we get a palindrome (49811894).

The spelling of 21401482 in words is "twenty-one million, four hundred one thousand, four hundred eighty-two".