21376084 has 24 divisors (see below), whose sum is σ = 38841320. Its totient is φ = 10285056.

The previous prime is 21376073. The next prime is 21376093. The reversal of 21376084 is 48067312.

It can be written as a sum of positive squares in 4 ways, for example, as 3920400 + 17455684 = 1980^2 + 4178^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13612 + ... + 15100.

Almost surely, 2^21376084 is an apocalyptic number.

It is an amenable number.

21376084 is a deficient number, since it is larger than the sum of its proper divisors (17465236).

21376084 is a wasteful number, since it uses less digits than its factorization.

21376084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21376084 is about 4623.4277327541. The cubic root of 21376084 is about 277.5296464823.

The spelling of 21376084 in words is "twenty-one million, three hundred seventy-six thousand, eighty-four".