20007489 has 4 divisors (see below), whose sum is σ = 26676656. Its totient is φ = 13338324.

The previous prime is 20007479. The next prime is 20007503. The reversal of 20007489 is 98470002.

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 not a de Polignac number, because 20007489 - 2⁵ = 20007457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20007409) 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, 3334579 + ... + 3334584.

It is an arithmetic number, because the mean of its divisors is an integer number (6669164).

Almost surely, 2^20007489 is an apocalyptic number.

It is an amenable number.

20007489 is a deficient number, since it is larger than the sum of its proper divisors (6669167).

20007489 is an equidigital number, since it uses as much as digits as its factorization.

20007489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669166.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 20007489 is about 4472.9731722871. The cubic root of 20007489 is about 271.4756378874.

The spelling of 20007489 in words is "twenty million, seven thousand, four hundred eighty-nine".