20609119 has 4 divisors (see below), whose sum is σ = 20716096. Its totient is φ = 20502144.

The previous prime is 20609093. The next prime is 20609123. The reversal of 20609119 is 91190602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91190602 = 2 ⋅45595301.

It is a cyclic number.

It is not a de Polignac number, because 20609119 - 2¹⁵ = 20576351 is a prime.

It is a super-2 number, since 2×20609119² = 849471571912322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20609159) 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, 53199 + ... + 53584.

It is an arithmetic number, because the mean of its divisors is an integer number (5179024).

Almost surely, 2^20609119 is an apocalyptic number.

20609119 is a deficient number, since it is larger than the sum of its proper divisors (106977).

20609119 is a wasteful number, since it uses less digits than its factorization.

20609119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106976.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 20609119 is about 4539.7267538917. The cubic root of 20609119 is about 274.1699223054.

The spelling of 20609119 in words is "twenty million, six hundred nine thousand, one hundred nineteen".