20452047 has 64 divisors (see below), whose sum is σ = 36495360. Its totient is φ = 9878400.

The previous prime is 20452039. The next prime is 20452049. The reversal of 20452047 is 74025402.

It is not a de Polignac number, because 20452047 - 2³ = 20452039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288022 + ... + 288092.

It is an arithmetic number, because the mean of its divisors is an integer number (570240).

Almost surely, 2^20452047 is an apocalyptic number.

20452047 is a deficient number, since it is larger than the sum of its proper divisors (16043313).

20452047 is a wasteful number, since it uses less digits than its factorization.

20452047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 20452047 is about 4522.3939456885. The cubic root of 20452047 is about 273.4716183408.

Adding to 20452047 its reverse (74025402), we get a palindrome (94477449).

The spelling of 20452047 in words is "twenty million, four hundred fifty-two thousand, forty-seven".