20418573 has 8 divisors (see below), whose sum is σ = 31114048. Its totient is φ = 11667744.

The previous prime is 20418571. The next prime is 20418583. The reversal of 20418573 is 37581402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20418573 - 2¹ = 20418571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20418573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20418571) 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, 486136 + ... + 486177.

It is an arithmetic number, because the mean of its divisors is an integer number (3889256).

Almost surely, 2^20418573 is an apocalyptic number.

It is an amenable number.

20418573 is a deficient number, since it is larger than the sum of its proper divisors (10695475).

20418573 is an equidigital number, since it uses as much as digits as its factorization.

20418573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972323.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20418573 is about 4518.6915141443. The cubic root of 20418573 is about 273.3223392696.

Adding to 20418573 its reverse (37581402), we get a palindrome (57999975).

The spelling of 20418573 in words is "twenty million, four hundred eighteen thousand, five hundred seventy-three".