20057181 has 8 divisors (see below), whose sum is σ = 26764704. Its totient is φ = 13360560.

The previous prime is 20057171. The next prime is 20057189. The reversal of 20057181 is 18175002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20057181 - 2⁶ = 20057117 is a prime.

It is a super-2 number, since 2×20057181² = 804581019333522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20057189) 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, 3811 + ... + 7391.

It is an arithmetic number, because the mean of its divisors is an integer number (3345588).

Almost surely, 2^20057181 is an apocalyptic number.

It is an amenable number.

20057181 is a deficient number, since it is larger than the sum of its proper divisors (6707523).

20057181 is a wasteful number, since it uses less digits than its factorization.

20057181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5451.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 20057181 is about 4478.5244221730. The cubic root of 20057181 is about 271.7002040387.

The spelling of 20057181 in words is "twenty million, fifty-seven thousand, one hundred eighty-one".