20452747 has 8 divisors (see below), whose sum is σ = 23852000. Its totient is φ = 17530632.

The previous prime is 20452739. The next prime is 20452769. The reversal of 20452747 is 74725402.

It is not a de Polignac number, because 20452747 - 2³ = 20452739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20452147) 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 7 ways as a sum of consecutive naturals, for example, 29472 + ... + 30157.

It is an arithmetic number, because the mean of its divisors is an integer number (2981500).

Almost surely, 2^20452747 is an apocalyptic number.

20452747 is a deficient number, since it is larger than the sum of its proper divisors (3399253).

20452747 is an frugal number, since it uses more digits than its factorization.

20452747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59650 (or 59636 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 20452747 is about 4522.4713376648. The cubic root of 20452747 is about 273.4747382884.

The spelling of 20452747 in words is "twenty million, four hundred fifty-two thousand, seven hundred forty-seven".