20194745 has 4 divisors (see below), whose sum is σ = 24233700. Its totient is φ = 16155792.

The previous prime is 20194729. The next prime is 20194747. The reversal of 20194745 is 54749102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54749102 = 2 ⋅27374551.

It can be written as a sum of positive squares in 2 ways, for example, as 9357481 + 10837264 = 3059^2 + 3292^2 .

It is a cyclic number.

It is not a de Polignac number, because 20194745 - 2⁴ = 20194729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20194747) 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, 2019470 + ... + 2019479.

It is an arithmetic number, because the mean of its divisors is an integer number (6058425).

Almost surely, 2^20194745 is an apocalyptic number.

It is an amenable number.

20194745 is a deficient number, since it is larger than the sum of its proper divisors (4038955).

20194745 is an equidigital number, since it uses as much as digits as its factorization.

20194745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038954.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20194745 is about 4493.8563617454. The cubic root of 20194745 is about 272.3199495171.

The spelling of 20194745 in words is "twenty million, one hundred ninety-four thousand, seven hundred forty-five".