20189039 has 8 divisors (see below), whose sum is σ = 22886640. Its totient is φ = 17654976.

The previous prime is 20189023. The next prime is 20189069. The reversal of 20189039 is 93098102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20189039 - 2⁴ = 20189023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20188996 and 20189014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20189069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40622 + ... + 41115.

It is an arithmetic number, because the mean of its divisors is an integer number (2860830).

Almost surely, 2^20189039 is an apocalyptic number.

20189039 is a deficient number, since it is larger than the sum of its proper divisors (2697601).

20189039 is a wasteful number, since it uses less digits than its factorization.

20189039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81769.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 20189039 is about 4493.2214501402. The cubic root of 20189039 is about 272.2942992138.

The spelling of 20189039 in words is "twenty million, one hundred eighty-nine thousand, thirty-nine".