20472583 has 2 divisors, whose sum is σ = 20472584. Its totient is φ = 20472582.

The previous prime is 20472559. The next prime is 20472611. The reversal of 20472583 is 38527402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20472583 - 2¹³ = 20464391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20472533) 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 as a sum of consecutive naturals, namely, 10236291 + 10236292.

It is an arithmetic number, because the mean of its divisors is an integer number (10236292).

Almost surely, 2^20472583 is an apocalyptic number.

20472583 is a deficient number, since it is larger than the sum of its proper divisors (1).

20472583 is an equidigital number, since it uses as much as digits as its factorization.

20472583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20472583 is about 4524.6638549178. The cubic root of 20472583 is about 273.5631191168.

Adding to 20472583 its reverse (38527402), we get a palindrome (58999985).

The spelling of 20472583 in words is "twenty million, four hundred seventy-two thousand, five hundred eighty-three".