21410345 has 24 divisors (see below), whose sum is σ = 28932288. Its totient is φ = 15190560.

The previous prime is 21410341. The next prime is 21410351. The reversal of 21410345 is 54301412.

It is not a de Polignac number, because 21410345 - 2² = 21410341 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21410341) 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 23 ways as a sum of consecutive naturals, for example, 25604 + ... + 26426.

It is an arithmetic number, because the mean of its divisors is an integer number (1205512).

Almost surely, 2^21410345 is an apocalyptic number.

It is an amenable number.

21410345 is a deficient number, since it is larger than the sum of its proper divisors (7521943).

21410345 is a wasteful number, since it uses less digits than its factorization.

21410345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 21410345 is about 4627.1314007709. The cubic root of 21410345 is about 277.6778396340.

Adding to 21410345 its reverse (54301412), we get a palindrome (75711757).

The spelling of 21410345 in words is "twenty-one million, four hundred ten thousand, three hundred forty-five".