8019307481 has 4 divisors (see below), whose sum is σ = 8101980852. Its totient is φ = 7936634112.

The previous prime is 8019307451. The next prime is 8019307487. The reversal of 8019307481 is 1847039108.

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 2363515456 + 5655792025 = 48616^2 + 75205^2 .

It is a cyclic number.

It is not a de Polignac number, because 8019307481 - 2¹⁴ = 8019291097 is a prime.

It is a super-2 number, since 2×8019307481² (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 (8019307487) 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, 41336540 + ... + 41336733.

It is an arithmetic number, because the mean of its divisors is an integer number (2025495213).

Almost surely, 2^8019307481 is an apocalyptic number.

It is an amenable number.

8019307481 is a deficient number, since it is larger than the sum of its proper divisors (82673371).

8019307481 is an equidigital number, since it uses as much as digits as its factorization.

8019307481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82673370.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 8019307481 is about 89550.5861566523. The cubic root of 8019307481 is about 2001.6076641118.

The spelling of 8019307481 in words is "eight billion, nineteen million, three hundred seven thousand, four hundred eighty-one".