20189435 has 16 divisors (see below), whose sum is σ = 27777216. Its totient is φ = 13799808.

The previous prime is 20189431. The next prime is 20189437. The reversal of 20189435 is 53498102.

It is a cyclic number.

It is not a de Polignac number, because 20189435 - 2² = 20189431 is a prime.

It is a super-3 number, since 3×20189435³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20189431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13169 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (1736076).

Almost surely, 2^20189435 is an apocalyptic number.

20189435 is a deficient number, since it is larger than the sum of its proper divisors (7587781).

20189435 is a wasteful number, since it uses less digits than its factorization.

20189435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20189435 is about 4493.2655163033. The cubic root of 20189435 is about 272.2960795171.

The spelling of 20189435 in words is "twenty million, one hundred eighty-nine thousand, four hundred thirty-five".