36720220387 has 4 divisors (see below), whose sum is σ = 36724043520. Its totient is φ = 36716397256.

The previous prime is 36720220373. The next prime is 36720220399. The reversal of 36720220387 is 78302202763.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78302202763 = 4153 ⋅18854371.

It is a cyclic number.

It is not a de Polignac number, because 36720220387 - 2¹⁵ = 36720187619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36720220787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1897123 + ... + 1916380.

It is an arithmetic number, because the mean of its divisors is an integer number (9181010880).

Almost surely, 2^36720220387 is an apocalyptic number.

36720220387 is a deficient number, since it is larger than the sum of its proper divisors (3823133).

36720220387 is an equidigital number, since it uses as much as digits as its factorization.

36720220387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823132.

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 36720220387 in words is "thirty-six billion, seven hundred twenty million, two hundred twenty thousand, three hundred eighty-seven".