20161801 has 8 divisors (see below), whose sum is σ = 22089600. Its totient is φ = 18249840.

The previous prime is 20161789. The next prime is 20161807. The reversal of 20161801 is 10816102.

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 20161801 - 2⁹ = 20161289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20161807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (2761200).

Almost surely, 2^20161801 is an apocalyptic number.

It is an amenable number.

20161801 is a deficient number, since it is larger than the sum of its proper divisors (1927799).

20161801 is a wasteful number, since it uses less digits than its factorization.

20161801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 20161801 is about 4490.1894169400. The cubic root of 20161801 is about 272.1717890065.

Adding to 20161801 its reverse (10816102), we get a palindrome (30977903).

The spelling of 20161801 in words is "twenty million, one hundred sixty-one thousand, eight hundred one".