20531193 has 8 divisors (see below), whose sum is σ = 27891648. Its totient is φ = 13429104.

The previous prime is 20531183. The next prime is 20531213. The reversal of 20531193 is 39113502.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20531193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20531183) 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, 64405 + ... + 64722.

It is an arithmetic number, because the mean of its divisors is an integer number (3486456).

Almost surely, 2^20531193 is an apocalyptic number.

It is an amenable number.

20531193 is a deficient number, since it is larger than the sum of its proper divisors (7360455).

20531193 is a wasteful number, since it uses less digits than its factorization.

20531193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129183.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 20531193 is about 4531.1359502888. The cubic root of 20531193 is about 273.8239274077.

Adding to 20531193 its reverse (39113502), we get a palindrome (59644695).

The spelling of 20531193 in words is "twenty million, five hundred thirty-one thousand, one hundred ninety-three".