20163513 has 16 divisors (see below), whose sum is σ = 29163456. Its totient is φ = 12341760.

The previous prime is 20163509. The next prime is 20163529. The reversal of 20163513 is 31536102.

It is not a de Polignac number, because 20163513 - 2² = 20163509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20163513.

It is not an unprimeable number, because it can be changed into a prime (20163593) 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, 2731 + ... + 6912.

It is an arithmetic number, because the mean of its divisors is an integer number (1822716).

Almost surely, 2^20163513 is an apocalyptic number.

It is an amenable number.

20163513 is a deficient number, since it is larger than the sum of its proper divisors (8999943).

20163513 is a wasteful number, since it uses less digits than its factorization.

20163513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 20163513 is about 4490.3800507307. The cubic root of 20163513 is about 272.1794924340.

Adding to 20163513 its reverse (31536102), we get a palindrome (51699615).

The spelling of 20163513 in words is "twenty million, one hundred sixty-three thousand, five hundred thirteen".