20194117 has 8 divisors (see below), whose sum is σ = 20510424. Its totient is φ = 19880448.

The previous prime is 20194081. The next prime is 20194123. The reversal of 20194117 is 71149102.

It can be written as a sum of positive squares in 4 ways, for example, as 6548481 + 13645636 = 2559^2 + 3694^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20194117 is a prime.

It is a super-2 number, since 2×20194117² = 815604722819378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20194091 and 20194100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19033 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (2563803).

Almost surely, 2^20194117 is an apocalyptic number.

It is an amenable number.

20194117 is a deficient number, since it is larger than the sum of its proper divisors (316307).

20194117 is a wasteful number, since it uses less digits than its factorization.

20194117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 20194117 is about 4493.7864880299. The cubic root of 20194117 is about 272.3171266919.

The spelling of 20194117 in words is "twenty million, one hundred ninety-four thousand, one hundred seventeen".