20460547 has 4 divisors (see below), whose sum is σ = 21350160. Its totient is φ = 19570936.

The previous prime is 20460533. The next prime is 20460553. The reversal of 20460547 is 74506402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20460547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20460577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444772 + ... + 444817.

It is an arithmetic number, because the mean of its divisors is an integer number (5337540).

Almost surely, 2^20460547 is an apocalyptic number.

20460547 is a deficient number, since it is larger than the sum of its proper divisors (889613).

20460547 is an equidigital number, since it uses as much as digits as its factorization.

20460547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889612.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20460547 is about 4523.3336158192. Note that the first 3 decimals coincide. The cubic root of 20460547 is about 273.5094986045.

Adding to 20460547 its reverse (74506402), we get a palindrome (94966949).

The spelling of 20460547 in words is "twenty million, four hundred sixty thousand, five hundred forty-seven".