36021813 has 8 divisors (see below), whose sum is σ = 48746208. Its totient is φ = 23655984.

The previous prime is 36021809. The next prime is 36021847. The reversal of 36021813 is 31812063.

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

It is not a de Polignac number, because 36021813 - 2² = 36021809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36021803) 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, 89406 + ... + 89807.

It is an arithmetic number, because the mean of its divisors is an integer number (6093276).

Almost surely, 2^36021813 is an apocalyptic number.

It is an amenable number.

36021813 is a deficient number, since it is larger than the sum of its proper divisors (12724395).

36021813 is a wasteful number, since it uses less digits than its factorization.

36021813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179283.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 36021813 is about 6001.8174747321. The cubic root of 36021813 is about 330.2594011829.

Adding to 36021813 its reverse (31812063), we get a palindrome (67833876).

The spelling of 36021813 in words is "thirty-six million, twenty-one thousand, eight hundred thirteen".