20150618235136 has 81 divisors (see below), whose sum is σ = 40503014706189. Its totient is φ = 10005532972032.

The previous prime is 20150618235131. The next prime is 20150618235193. The reversal of 20150618235136 is 63153281605102.

The square root of 20150618235136 is 4488944.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5906455302400 + 14244162932736 = 2430320^2 + 3774144^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20150618235092 and 20150618235101.

It is not an unprimeable number, because it can be changed into a prime (20150618235131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11276226435 + ... + 11276228221.

Almost surely, 2^{20150618235136} is an apocalyptic number.

20150618235136 is the 4488944-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20150618235136

20150618235136 is an abundant number, since it is smaller than the sum of its proper divisors (20352396471053).

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

20150618235136 is an frugal number, since it uses more digits than its factorization.

20150618235136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 20150618235136 in words is "twenty trillion, one hundred fifty billion, six hundred eighteen million, two hundred thirty-five thousand, one hundred thirty-six".