20344547 has 6 divisors (see below), whose sum is σ = 20830572. Its totient is φ = 19869612.

The previous prime is 20344517. The next prime is 20344549. The reversal of 20344547 is 74544302.

It is not a de Polignac number, because 20344547 - 2¹² = 20340451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3653 + ... + 7350.

It is an arithmetic number, because the mean of its divisors is an integer number (3471762).

Almost surely, 2^20344547 is an apocalyptic number.

20344547 is a deficient number, since it is larger than the sum of its proper divisors (486025).

20344547 is an equidigital number, since it uses as much as digits as its factorization.

20344547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11089 (or 11046 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 20344547 is about 4510.4929885767. The cubic root of 20344547 is about 272.9916361090.

Adding to 20344547 its reverse (74544302), we get a palindrome (94888849).

The spelling of 20344547 in words is "twenty million, three hundred forty-four thousand, five hundred forty-seven".