20609073 has 12 divisors (see below), whose sum is σ = 30871568. Its totient is φ = 13739220.

The previous prime is 20609041. The next prime is 20609089. The reversal of 20609073 is 37090602.

It is not a de Polignac number, because 20609073 - 2⁵ = 20609041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20609023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42163 + ... + 42648.

Almost surely, 2^20609073 is an apocalyptic number.

It is an amenable number.

20609073 is a deficient number, since it is larger than the sum of its proper divisors (10262495).

20609073 is an frugal number, since it uses more digits than its factorization.

20609073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84826 (or 84814 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20609073 is about 4539.7216875046. The cubic root of 20609073 is about 274.1697183209.

Adding to 20609073 its reverse (37090602), we get a palindrome (57699675).

The spelling of 20609073 in words is "twenty million, six hundred nine thousand, seventy-three".