20189433 has 8 divisors (see below), whose sum is σ = 29366496. Its totient is φ = 12236000.

The previous prime is 20189431. The next prime is 20189437. The reversal of 20189433 is 33498102.

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 20189433 - 2¹ = 20189431 is a prime.

It is a super-2 number, since 2×20189433² = 815226409722978, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20189433.

It is not an unprimeable number, because it can be changed into a prime (20189431) 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 7 ways as a sum of consecutive naturals, for example, 305868 + ... + 305933.

It is an arithmetic number, because the mean of its divisors is an integer number (3670812).

Almost surely, 2^20189433 is an apocalyptic number.

It is an amenable number.

20189433 is a deficient number, since it is larger than the sum of its proper divisors (9177063).

20189433 is a wasteful number, since it uses less digits than its factorization.

20189433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611815.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 20189433 is about 4493.2652937480. The cubic root of 20189433 is about 272.2960705257.

The spelling of 20189433 in words is "twenty million, one hundred eighty-nine thousand, four hundred thirty-three".