20194469 has 4 divisors (see below), whose sum is σ = 20890860. Its totient is φ = 19498080.

The previous prime is 20194409. The next prime is 20194507. The reversal of 20194469 is 96449102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96449102 = 2 ⋅48224551.

It can be written as a sum of positive squares in 2 ways, for example, as 14250625 + 5943844 = 3775^2 + 2438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20194469 is a prime.

It is a super-2 number, since 2×20194469² = 815633156383922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194409) 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, 348152 + ... + 348209.

It is an arithmetic number, because the mean of its divisors is an integer number (5222715).

Almost surely, 2^20194469 is an apocalyptic number.

20194469 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20194469 is a deficient number, since it is larger than the sum of its proper divisors (696391).

20194469 is an equidigital number, since it uses as much as digits as its factorization.

20194469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696390.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20194469 is about 4493.8256530489. The cubic root of 20194469 is about 272.3187089196.

The spelling of 20194469 in words is "twenty million, one hundred ninety-four thousand, four hundred sixty-nine".