20419489 has 4 divisors (see below), whose sum is σ = 20459056. Its totient is φ = 20379924.

The previous prime is 20419481. The next prime is 20419501. The reversal of 20419489 is 98491402.

It is a happy number.

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 20419489 - 2³ = 20419481 is a prime.

It is a super-2 number, since 2×20419489² = 833911062042242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20419481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18999 + ... + 20044.

It is an arithmetic number, because the mean of its divisors is an integer number (5114764).

Almost surely, 2^20419489 is an apocalyptic number.

It is an amenable number.

20419489 is a deficient number, since it is larger than the sum of its proper divisors (39567).

20419489 is an equidigital number, since it uses as much as digits as its factorization.

20419489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39566.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 20419489 is about 4518.7928697828. The cubic root of 20419489 is about 273.3264263903.

The spelling of 20419489 in words is "twenty million, four hundred nineteen thousand, four hundred eighty-nine".