21486452 has 12 divisors (see below), whose sum is σ = 40493796. Its totient is φ = 9916800.

The previous prime is 21486449. The next prime is 21486461. The reversal of 21486452 is 25468412.

It can be written as a sum of positive squares in 2 ways, for example, as 929296 + 20557156 = 964^2 + 4534^2 .

It is a congruent number.

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, 206549 + ... + 206652.

It is an arithmetic number, because the mean of its divisors is an integer number (3374483).

Almost surely, 2^21486452 is an apocalyptic number.

It is an amenable number.

21486452 is a deficient number, since it is larger than the sum of its proper divisors (19007344).

21486452 is a wasteful number, since it uses less digits than its factorization.

21486452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413218 (or 413216 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 21486452 is about 4635.3480991183. The cubic root of 21486452 is about 278.0064694939.

The spelling of 21486452 in words is "twenty-one million, four hundred eighty-six thousand, four hundred fifty-two".