21073466 has 4 divisors (see below), whose sum is σ = 31610202. Its totient is φ = 10536732.

The previous prime is 21073457. The next prime is 21073469. The reversal of 21073466 is 66437012.

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

It can be written as a sum of positive squares in only one way, i.e., 12103441 + 8970025 = 3479^2 + 2995^2 .

It is not an unprimeable number, because it can be changed into a prime (21073469) by changing a digit.

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, 5268365 + ... + 5268368.

Almost surely, 2^21073466 is an apocalyptic number.

21073466 is a deficient number, since it is larger than the sum of its proper divisors (10536736).

21073466 is a wasteful number, since it uses less digits than its factorization.

21073466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10536735.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 21073466 is about 4590.5844943754. The cubic root of 21073466 is about 276.2137687856.

The spelling of 21073466 in words is "twenty-one million, seventy-three thousand, four hundred sixty-six".