20342161 has 8 divisors (see below), whose sum is σ = 23488640. Its totient is φ = 17255808.

The previous prime is 20342131. The next prime is 20342167. The reversal of 20342161 is 16124302.

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 20342161 - 2⁵ = 20342129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20342167) 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, 14301 + ... + 15658.

It is an arithmetic number, because the mean of its divisors is an integer number (2936080).

Almost surely, 2^20342161 is an apocalyptic number.

It is an amenable number.

20342161 is a deficient number, since it is larger than the sum of its proper divisors (3146479).

20342161 is an equidigital number, since it uses as much as digits as its factorization.

20342161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30063.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20342161 is about 4510.2284864517. The cubic root of 20342161 is about 272.9809635767.

Adding to 20342161 its reverse (16124302), we get a palindrome (36466463).

It can be divided in two parts, 20342 and 161, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20342161 in words is "twenty million, three hundred forty-two thousand, one hundred sixty-one".