20289194 has 8 divisors (see below), whose sum is σ = 32224068. Its totient is φ = 9547840.

The previous prime is 20289193. The next prime is 20289277. The reversal of 20289194 is 49198202.

It can be written as a sum of positive squares in 2 ways, for example, as 20133169 + 156025 = 4487^2 + 395^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20289193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298337 + ... + 298404.

Almost surely, 2^20289194 is an apocalyptic number.

20289194 is a deficient number, since it is larger than the sum of its proper divisors (11934874).

20289194 is a wasteful number, since it uses less digits than its factorization.

20289194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596760.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 20289194 is about 4504.3527836971. The cubic root of 20289194 is about 272.7438279984.

The spelling of 20289194 in words is "twenty million, two hundred eighty-nine thousand, one hundred ninety-four".