20189299 has 4 divisors (see below), whose sum is σ = 21742336. Its totient is φ = 18636264.

The previous prime is 20189291. The next prime is 20189303. The reversal of 20189299 is 99298102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20189299 - 2³ = 20189291 is a prime.

It is a super-2 number, since 2×20189299² = 815215588222802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20189291) 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, 776499 + ... + 776524.

It is an arithmetic number, because the mean of its divisors is an integer number (5435584).

Almost surely, 2^20189299 is an apocalyptic number.

20189299 is a deficient number, since it is larger than the sum of its proper divisors (1553037).

20189299 is a wasteful number, since it uses less digits than its factorization.

20189299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553036.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 20189299 is about 4493.2503825182. The cubic root of 20189299 is about 272.2954681024.

The spelling of 20189299 in words is "twenty million, one hundred eighty-nine thousand, two hundred ninety-nine".