20407093 has 4 divisors (see below), whose sum is σ = 23322400. Its totient is φ = 17491788.

The previous prime is 20407031. The next prime is 20407099. The reversal of 20407093 is 39070402.

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 a de Polignac number, because none of the positive numbers 2^k-20407093 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 (20407099) 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, 1457643 + ... + 1457656.

It is an arithmetic number, because the mean of its divisors is an integer number (5830600).

Almost surely, 2^20407093 is an apocalyptic number.

It is an amenable number.

20407093 is a deficient number, since it is larger than the sum of its proper divisors (2915307).

20407093 is an equidigital number, since it uses as much as digits as its factorization.

20407093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915306.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20407093 is about 4517.4210563108. The cubic root of 20407093 is about 273.2711060340.

Adding to 20407093 its reverse (39070402), we get a palindrome (59477495).

The spelling of 20407093 in words is "twenty million, four hundred seven thousand, ninety-three".