21414355 has 12 divisors (see below), whose sum is σ = 26148096. Its totient is φ = 16836000.

The previous prime is 21414313. The next prime is 21414361. The reversal of 21414355 is 55341412.

It is a happy number.

It is not a de Polignac number, because 21414355 - 2¹³ = 21406163 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18030 + ... + 19180.

It is an arithmetic number, because the mean of its divisors is an integer number (2179008).

Almost surely, 2^21414355 is an apocalyptic number.

21414355 is a deficient number, since it is larger than the sum of its proper divisors (4733741).

21414355 is an equidigital number, since it uses as much as digits as its factorization.

21414355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1217 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 21414355 is about 4627.5646943074. The cubic root of 21414355 is about 277.6951742236.

Adding to 21414355 its reverse (55341412), we get a palindrome (76755767).

The spelling of 21414355 in words is "twenty-one million, four hundred fourteen thousand, three hundred fifty-five".