21064112 has 10 divisors (see below), whose sum is σ = 40811748. Its totient is φ = 10532048.

The previous prime is 21064081. The next prime is 21064117. The reversal of 21064112 is 21146012.

It is not an unprimeable number, because it can be changed into a prime (21064117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658238 + ... + 658269.

Almost surely, 2^21064112 is an apocalyptic number.

It is an amenable number.

21064112 is a deficient number, since it is larger than the sum of its proper divisors (19747636).

21064112 is a wasteful number, since it uses less digits than its factorization.

21064112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316515 (or 1316509 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21064112 is about 4589.5655567820. The cubic root of 21064112 is about 276.1728945417.

The spelling of 21064112 in words is "twenty-one million, sixty-four thousand, one hundred twelve".