21849064 has 32 divisors (see below), whose sum is σ = 43432200. Its totient is φ = 10286080.

The previous prime is 21849059. The next prime is 21849067. The reversal of 21849064 is 46094812.

It can be written as a sum of positive squares in 4 ways, for example, as 13264164 + 8584900 = 3642^2 + 2930^2 .

It is not an unprimeable number, because it can be changed into a prime (21849067) 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, 8364 + ... + 10660.

Almost surely, 2^21849064 is an apocalyptic number.

It is an amenable number.

21849064 is a deficient number, since it is larger than the sum of its proper divisors (21583136).

21849064 is a wasteful number, since it uses less digits than its factorization.

21849064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2369 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 21849064 is about 4674.2982360992. The cubic root of 21849064 is about 279.5616610790.

The spelling of 21849064 in words is "twenty-one million, eight hundred forty-nine thousand, sixty-four".