20935220361615 has 144 divisors (see below), whose sum is σ = 43212221065728. Its totient is φ = 9343858833792.

The previous prime is 20935220361533. The next prime is 20935220361619. The reversal of 20935220361615 is 51616302253902.

20935220361615 is a `hidden beast` number, since 2 + 0 + 9 + 3 + 5 + 2 + 20 + 3 + 6 + 1 + 615 = 666.

It is not a de Polignac number, because 20935220361615 - 2⁷ = 20935220361487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20935220361619) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 229691182 + ... + 229782308.

It is an arithmetic number, because the mean of its divisors is an integer number (300084868512).

Almost surely, 2^{20935220361615} is an apocalyptic number.

20935220361615 is an abundant number, since it is smaller than the sum of its proper divisors (22277000704113).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20935220361615 is a wasteful number, since it uses less digits than its factorization.

20935220361615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93618 (or 93608 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 20935220361615 in words is "twenty trillion, nine hundred thirty-five billion, two hundred twenty million, three hundred sixty-one thousand, six hundred fifteen".