36121813 has 8 divisors (see below), whose sum is σ = 44457728. Its totient is φ = 28579824.

The previous prime is 36121801. The next prime is 36121817. The reversal of 36121813 is 31812163.

36121813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 36121813 - 2⁵ = 36121781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36121817) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 198381 + ... + 198562.

It is an arithmetic number, because the mean of its divisors is an integer number (5557216).

Almost surely, 2^36121813 is an apocalyptic number.

It is an amenable number.

36121813 is a deficient number, since it is larger than the sum of its proper divisors (8335915).

36121813 is a wasteful number, since it uses less digits than its factorization.

36121813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396963.

The product of its digits is 864, while the sum is 25.

The square root of 36121813 is about 6010.1425107896. The cubic root of 36121813 is about 330.5647293842.

Adding to 36121813 its reverse (31812163), we get a palindrome (67933976).

The spelling of 36121813 in words is "thirty-six million, one hundred twenty-one thousand, eight hundred thirteen".