20493307 has 4 divisors (see below), whose sum is σ = 20554456. Its totient is φ = 20432160.

The previous prime is 20493293. The next prime is 20493323. The reversal of 20493307 is 70339402.

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

It is a cyclic number.

It is not a de Polignac number, because 20493307 - 2²³ = 12104699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20493337) 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, 30069 + ... + 30742.

It is an arithmetic number, because the mean of its divisors is an integer number (5138614).

Almost surely, 2^20493307 is an apocalyptic number.

20493307 is a deficient number, since it is larger than the sum of its proper divisors (61149).

20493307 is an equidigital number, since it uses as much as digits as its factorization.

20493307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61148.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20493307 is about 4526.9533905266. The cubic root of 20493307 is about 273.6553955396.

It can be divided in two parts, 2049 and 3307, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 20493307 in words is "twenty million, four hundred ninety-three thousand, three hundred seven".