20088649 has 4 divisors (see below), whose sum is σ = 22958464. Its totient is φ = 17218836.

The previous prime is 20088631. The next prime is 20088659. The reversal of 20088649 is 94688002.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94688002 = 2 ⋅47344001.

It is a cyclic number.

It is not a de Polignac number, because 20088649 - 2⁵ = 20088617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20088659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434897 + ... + 1434910.

It is an arithmetic number, because the mean of its divisors is an integer number (5739616).

Almost surely, 2^20088649 is an apocalyptic number.

It is an amenable number.

20088649 is a deficient number, since it is larger than the sum of its proper divisors (2869815).

20088649 is an equidigital number, since it uses as much as digits as its factorization.

20088649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869814.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20088649 is about 4482.0362559890. The cubic root of 20088649 is about 271.8422212474.

The spelling of 20088649 in words is "twenty million, eighty-eight thousand, six hundred forty-nine".