20168461 has 8 divisors (see below), whose sum is σ = 20619360. Its totient is φ = 19720272.

The previous prime is 20168459. The next prime is 20168497. The reversal of 20168461 is 16486102.

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

It is a cyclic number.

It is not a de Polignac number, because 20168461 - 2¹ = 20168459 is a prime.

It is a deceptive number, since it divides R_20168460.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168411) 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, 23050 + ... + 23908.

It is an arithmetic number, because the mean of its divisors is an integer number (2577420).

Almost surely, 2^20168461 is an apocalyptic number.

It is an amenable number.

20168461 is a deficient number, since it is larger than the sum of its proper divisors (450899).

20168461 is an equidigital number, since it uses as much as digits as its factorization.

20168461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20168461 is about 4490.9309725267. The cubic root of 20168461 is about 272.2017543282.

The spelling of 20168461 in words is "twenty million, one hundred sixty-eight thousand, four hundred sixty-one".