21066352 has 10 divisors (see below), whose sum is σ = 40816088. Its totient is φ = 10533168.

The previous prime is 21066347. The next prime is 21066359. The reversal of 21066352 is 25366012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21066359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658308 + ... + 658339.

Almost surely, 2^21066352 is an apocalyptic number.

It is an amenable number.

21066352 is a deficient number, since it is larger than the sum of its proper divisors (19749736).

21066352 is a wasteful number, since it uses less digits than its factorization.

21066352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316655 (or 1316649 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 21066352 is about 4589.8095821069. The cubic root of 21066352 is about 276.1826837882.

The spelling of 21066352 in words is "twenty-one million, sixty-six thousand, three hundred fifty-two".