21014345 has 16 divisors (see below), whose sum is σ = 28183680. Its totient is φ = 14908800.

The previous prime is 21014339. The next prime is 21014347. The reversal of 21014345 is 54341012.

It is not a de Polignac number, because 21014345 - 2¹⁴ = 20997961 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 (21014347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2405 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (1761480).

Almost surely, 2^21014345 is an apocalyptic number.

It is an amenable number.

21014345 is a deficient number, since it is larger than the sum of its proper divisors (7169335).

21014345 is a wasteful number, since it uses less digits than its factorization.

21014345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376.

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

The square root of 21014345 is about 4584.1405955751. The cubic root of 21014345 is about 275.9552236050.

Adding to 21014345 its reverse (54341012), we get a palindrome (75355357).

It can be divided in two parts, 2101 and 4345, that added together give a palindrome (6446).

The spelling of 21014345 in words is "twenty-one million, fourteen thousand, three hundred forty-five".