20830161 has 16 divisors (see below), whose sum is σ = 30405888. Its totient is φ = 12579600.

The previous prime is 20830153. The next prime is 20830163. The reversal of 20830161 is 16103802.

It is not a de Polignac number, because 20830161 - 2³ = 20830153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20830163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9970 + ... + 11876.

It is an arithmetic number, because the mean of its divisors is an integer number (1900368).

Almost surely, 2^20830161 is an apocalyptic number.

It is an amenable number.

20830161 is a deficient number, since it is larger than the sum of its proper divisors (9575727).

20830161 is a wasteful number, since it uses less digits than its factorization.

20830161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20830161 is about 4564.0071209410. The cubic root of 20830161 is about 275.1466369471.

Adding to 20830161 its reverse (16103802), we get a palindrome (36933963).

The spelling of 20830161 in words is "twenty million, eight hundred thirty thousand, one hundred sixty-one".