20073605 has 4 divisors (see below), whose sum is σ = 24088332. Its totient is φ = 16058880.

The previous prime is 20073601. The next prime is 20073611. The reversal of 20073605 is 50637002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8958049 + 11115556 = 2993^2 + 3334^2 .

It is not a de Polignac number, because 20073605 - 2² = 20073601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20073601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2007356 + ... + 2007365.

It is an arithmetic number, because the mean of its divisors is an integer number (6022083).

Almost surely, 2^20073605 is an apocalyptic number.

It is an amenable number.

20073605 is a deficient number, since it is larger than the sum of its proper divisors (4014727).

20073605 is an equidigital number, since it uses as much as digits as its factorization.

20073605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014726.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20073605 is about 4480.3576866139. The cubic root of 20073605 is about 271.7743451768.

The spelling of 20073605 in words is "twenty million, seventy-three thousand, six hundred five".