20513195 has 8 divisors (see below), whose sum is σ = 24645600. Its totient is φ = 16390720.

The previous prime is 20513191. The next prime is 20513231. The reversal of 20513195 is 59131502.

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

It is not a de Polignac number, because 20513195 - 2² = 20513191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20513191) 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, 3290 + ... + 7200.

It is an arithmetic number, because the mean of its divisors is an integer number (3080700).

Almost surely, 2^20513195 is an apocalyptic number.

20513195 is a deficient number, since it is larger than the sum of its proper divisors (4132405).

20513195 is a wasteful number, since it uses less digits than its factorization.

20513195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 20513195 is about 4529.1494786549. The cubic root of 20513195 is about 273.7438910808.

Adding to 20513195 its reverse (59131502), we get a palindrome (79644697).

The spelling of 20513195 in words is "twenty million, five hundred thirteen thousand, one hundred ninety-five".