20196535 has 4 divisors (see below), whose sum is σ = 24235848. Its totient is φ = 16157224.

The previous prime is 20196529. The next prime is 20196577. The reversal of 20196535 is 53569102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20196535 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20196497 and 20196506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019649 + ... + 2019658.

It is an arithmetic number, because the mean of its divisors is an integer number (6058962).

Almost surely, 2^20196535 is an apocalyptic number.

20196535 is a deficient number, since it is larger than the sum of its proper divisors (4039313).

20196535 is an equidigital number, since it uses as much as digits as its factorization.

20196535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039312.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 20196535 is about 4494.0555181261. The cubic root of 20196535 is about 272.3279951466.

The spelling of 20196535 in words is "twenty million, one hundred ninety-six thousand, five hundred thirty-five".