21066062 has 4 divisors (see below), whose sum is σ = 31599096. Its totient is φ = 10533030.

The previous prime is 21066049. The next prime is 21066107. The reversal of 21066062 is 26066012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5266514 + ... + 5266517.

It is an arithmetic number, because the mean of its divisors is an integer number (7899774).

Almost surely, 2^21066062 is an apocalyptic number.

21066062 is a deficient number, since it is larger than the sum of its proper divisors (10533034).

21066062 is a wasteful number, since it uses less digits than its factorization.

21066062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10533033.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21066062 is about 4589.7779902736. Note that the first 3 decimals coincide. The cubic root of 21066062 is about 276.1814164695.

The spelling of 21066062 in words is "twenty-one million, sixty-six thousand, sixty-two".