20407073 has 4 divisors (see below), whose sum is σ = 20497200. Its totient is φ = 20316948.

The previous prime is 20407031. The next prime is 20407099. The reversal of 20407073 is 37070402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20407073 - 2²⁰ = 19358497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20403073) 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, 44723 + ... + 45176.

It is an arithmetic number, because the mean of its divisors is an integer number (5124300).

Almost surely, 2^20407073 is an apocalyptic number.

It is an amenable number.

20407073 is a deficient number, since it is larger than the sum of its proper divisors (90127).

20407073 is an equidigital number, since it uses as much as digits as its factorization.

20407073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90126.

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 20407073 is about 4517.4188426578. The cubic root of 20407073 is about 273.2710167607.

Adding to 20407073 its reverse (37070402), we get a palindrome (57477475).

The spelling of 20407073 in words is "twenty million, four hundred seven thousand, seventy-three".