21014465 has 8 divisors (see below), whose sum is σ = 26700840. Its totient is φ = 15822592.

The previous prime is 21014459. The next prime is 21014471. The reversal of 21014465 is 56441012.

It is an interprime number because it is at equal distance from previous prime (21014459) and next prime (21014471).

It can be written as a sum of positive squares in 4 ways, for example, as 908209 + 20106256 = 953^2 + 4484^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21014465 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21014465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123530 + ... + 123699.

It is an arithmetic number, because the mean of its divisors is an integer number (3337605).

Almost surely, 2^21014465 is an apocalyptic number.

It is an amenable number.

21014465 is a deficient number, since it is larger than the sum of its proper divisors (5686375).

21014465 is a wasteful number, since it uses less digits than its factorization.

21014465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247251.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21014465 is about 4584.1536841603. The cubic root of 21014465 is about 275.9557488742.

Adding to 21014465 its reverse (56441012), we get a palindrome (77455477).

The spelling of 21014465 in words is "twenty-one million, fourteen thousand, four hundred sixty-five".