20465161 has 8 divisors (see below), whose sum is σ = 21841920. Its totient is φ = 19107648.

The previous prime is 20465149. The next prime is 20465189. The reversal of 20465161 is 16156402.

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 20465161 - 2¹⁷ = 20334089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20465131) 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, 2581 + ... + 6898.

It is an arithmetic number, because the mean of its divisors is an integer number (2730240).

Almost surely, 2^20465161 is an apocalyptic number.

It is an amenable number.

20465161 is a deficient number, since it is larger than the sum of its proper divisors (1376759).

20465161 is a wasteful number, since it uses less digits than its factorization.

20465161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9623.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20465161 is about 4523.8436091448. The cubic root of 20465161 is about 273.5300565101.

The spelling of 20465161 in words is "twenty million, four hundred sixty-five thousand, one hundred sixty-one".