20313789 has 4 divisors (see below), whose sum is σ = 27085056. Its totient is φ = 13542524.

The previous prime is 20313781. The next prime is 20313809. The reversal of 20313789 is 98731302.

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 20313789 - 2³ = 20313781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3385629 + ... + 3385634.

It is an arithmetic number, because the mean of its divisors is an integer number (6771264).

Almost surely, 2^20313789 is an apocalyptic number.

It is an amenable number.

20313789 is a deficient number, since it is larger than the sum of its proper divisors (6771267).

20313789 is an equidigital number, since it uses as much as digits as its factorization.

20313789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771266.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20313789 is about 4507.0820937720. The cubic root of 20313789 is about 272.8539921526.

The spelling of 20313789 in words is "twenty million, three hundred thirteen thousand, seven hundred eighty-nine".