20081251369 has 4 divisors (see below), whose sum is σ = 20081621700. Its totient is φ = 20080881040.

The previous prime is 20081251367. The next prime is 20081251381. The reversal of 20081251369 is 96315218002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18215011369 + 1866240000 = 134963^2 + 43200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20081251369 - 2¹ = 20081251367 is a prime.

It is a super-2 number, since 2×20081251369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20081251361) 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, 86194 + ... + 218155.

It is an arithmetic number, because the mean of its divisors is an integer number (5020405425).

Almost surely, 2^20081251369 is an apocalyptic number.

It is an amenable number.

20081251369 is a deficient number, since it is larger than the sum of its proper divisors (370331).

20081251369 is an equidigital number, since it uses as much as digits as its factorization.

20081251369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370330.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 20081251369 in words is "twenty billion, eighty-one million, two hundred fifty-one thousand, three hundred sixty-nine".