20153161 has 12 divisors (see below), whose sum is σ = 23844240. Its totient is φ = 16978920.

The previous prime is 20153153. The next prime is 20153191. The reversal of 20153161 is 16135102.

It is not a de Polignac number, because 20153161 - 2³ = 20153153 is a prime.

It is a super-2 number, since 2×20153161² = 812299796583842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20153101) 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 11 ways as a sum of consecutive naturals, for example, 595 + ... + 6376.

It is an arithmetic number, because the mean of its divisors is an integer number (1987020).

Almost surely, 2^20153161 is an apocalyptic number.

It is an amenable number.

20153161 is a deficient number, since it is larger than the sum of its proper divisors (3691079).

20153161 is an equidigital number, since it uses as much as digits as its factorization.

20153161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044 (or 7037 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20153161 is about 4489.2272163480. The cubic root of 20153161 is about 272.1329052407.

Adding to 20153161 its reverse (16135102), we get a palindrome (36288263).

It can be divided in two parts, 20 and 153161, that added together give a triangular number (153181 = T₅₅₃).

The spelling of 20153161 in words is "twenty million, one hundred fifty-three thousand, one hundred sixty-one".