21114306 has 24 divisors (see below), whose sum is σ = 48439404. Its totient is φ = 6624000.

The previous prime is 21114293. The next prime is 21114307. The reversal of 21114306 is 60341112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20331081 + 783225 = 4509^2 + 885^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21114307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34195 + ... + 34806.

Almost surely, 2^21114306 is an apocalyptic number.

21114306 is an abundant number, since it is smaller than the sum of its proper divisors (27325098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21114306 is a wasteful number, since it uses less digits than its factorization.

21114306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69026 (or 69023 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21114306 is about 4595.0305766121. The cubic root of 21114306 is about 276.3920860903.

Adding to 21114306 its reverse (60341112), we get a palindrome (81455418).

The spelling of 21114306 in words is "twenty-one million, one hundred fourteen thousand, three hundred six".