21466047 has 8 divisors (see below), whose sum is σ = 28670256. Its totient is φ = 14286272.

The previous prime is 21466037. The next prime is 21466079. The reversal of 21466047 is 74066412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21466047 - 2¹¹ = 21463999 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3948 + ... + 7649.

It is an arithmetic number, because the mean of its divisors is an integer number (3583782).

Almost surely, 2^21466047 is an apocalyptic number.

21466047 is a deficient number, since it is larger than the sum of its proper divisors (7204209).

21466047 is a wasteful number, since it uses less digits than its factorization.

21466047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12217.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 21466047 is about 4633.1465549883. The cubic root of 21466047 is about 277.9184369871.

The spelling of 21466047 in words is "twenty-one million, four hundred sixty-six thousand, forty-seven".