21466061 has 8 divisors (see below), whose sum is σ = 23172480. Its totient is φ = 19824112.

The previous prime is 21466037. The next prime is 21466079. The reversal of 21466061 is 16066412.

It is a happy number.

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 21466061 - 2²² = 17271757 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 21466061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21466021) 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, 15425 + ... + 16758.

It is an arithmetic number, because the mean of its divisors is an integer number (2896560).

Almost surely, 2^21466061 is an apocalyptic number.

It is an amenable number.

21466061 is a deficient number, since it is larger than the sum of its proper divisors (1706419).

21466061 is a wasteful number, since it uses less digits than its factorization.

21466061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32235.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 21466061 is about 4633.1480658403. The cubic root of 21466061 is about 277.9184974059.

The spelling of 21466061 in words is "twenty-one million, four hundred sixty-six thousand, sixty-one".