20379609 has 12 divisors (see below), whose sum is σ = 30986800. Its totient is φ = 12871224.

The previous prime is 20379589. The next prime is 20379641. The reversal of 20379609 is 90697302.

It is not a de Polignac number, because 20379609 - 2⁵ = 20379577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20379649) 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 11 ways as a sum of consecutive naturals, for example, 59419 + ... + 59760.

Almost surely, 2^20379609 is an apocalyptic number.

It is an amenable number.

20379609 is a deficient number, since it is larger than the sum of its proper divisors (10607191).

20379609 is a wasteful number, since it uses less digits than its factorization.

20379609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119204 (or 119201 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 20379609 is about 4514.3780302496. The cubic root of 20379609 is about 273.1483716278.

The spelling of 20379609 in words is "twenty million, three hundred seventy-nine thousand, six hundred nine".