20361813 has 8 divisors (see below), whose sum is σ = 27170208. Its totient is φ = 13563984.

The previous prime is 20361791. The next prime is 20361827. The reversal of 20361813 is 31816302.

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

It is not a de Polignac number, because 20361813 - 2⁸ = 20361557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20361413) 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, 5106 + ... + 8172.

It is an arithmetic number, because the mean of its divisors is an integer number (3396276).

Almost surely, 2^20361813 is an apocalyptic number.

It is an amenable number.

20361813 is a deficient number, since it is larger than the sum of its proper divisors (6808395).

20361813 is a wasteful number, since it uses less digits than its factorization.

20361813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283.

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

The square root of 20361813 is about 4512.4065641296. The cubic root of 20361813 is about 273.0688417407.

The spelling of 20361813 in words is "twenty million, three hundred sixty-one thousand, eight hundred thirteen".