21414105 has 32 divisors (see below), whose sum is σ = 38400000. Its totient is φ = 11321856.

The previous prime is 21414103. The next prime is 21414119. The reversal of 21414105 is 50141412.

It is not a de Polignac number, because 21414105 - 2¹ = 21414103 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21414103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16521 + ... + 17769.

It is an arithmetic number, because the mean of its divisors is an integer number (1200000).

Almost surely, 2^21414105 is an apocalyptic number.

It is an amenable number.

21414105 is a deficient number, since it is larger than the sum of its proper divisors (16985895).

21414105 is a wasteful number, since it uses less digits than its factorization.

21414105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 21414105 is about 4627.5376821804. The cubic root of 21414105 is about 277.6940935768.

Adding to 21414105 its reverse (50141412), we get a palindrome (71555517).

It can be divided in two parts, 2141410 and 5, that added together give a triangular number (2141415 = T₂₀₆₉).

The spelling of 21414105 in words is "twenty-one million, four hundred fourteen thousand, one hundred five".