36501813 has 8 divisors (see below), whose sum is σ = 54076800. Its totient is φ = 24334524.

The previous prime is 36501791. The next prime is 36501853. The reversal of 36501813 is 31810563.

36501813 is a `hidden beast` number, since 3 + 650 + 1 + 8 + 1 + 3 = 666.

It is not a de Polignac number, because 36501813 - 2⁸ = 36501557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1351919 = 36501813 / (3 + 6 + 5 + 0 + 1 + 8 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36501853) 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, 675933 + ... + 675986.

It is an arithmetic number, because the mean of its divisors is an integer number (6759600).

Almost surely, 2^36501813 is an apocalyptic number.

It is an amenable number.

36501813 is a deficient number, since it is larger than the sum of its proper divisors (17574987).

36501813 is a wasteful number, since it uses less digits than its factorization.

36501813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351928 (or 1351922 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 36501813 is about 6041.6730298817. The cubic root of 36501813 is about 331.7198639730.

The spelling of 36501813 in words is "thirty-six million, five hundred one thousand, eight hundred thirteen".