10318501981 has 2 divisors, whose sum is σ = 10318501982. Its totient is φ = 10318501980.

The previous prime is 10318501961. The next prime is 10318502017. The reversal of 10318501981 is 18910581301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8628552100 + 1689949881 = 92890^2 + 41109^2 .

It is a cyclic number.

It is not a de Polignac number, because 10318501981 - 2¹⁹ = 10317977693 is a prime.

It is a super-2 number, since 2×10318501981² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10318501981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10318501901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5159250990 + 5159250991.

It is an arithmetic number, because the mean of its divisors is an integer number (5159250991).

Almost surely, 2^10318501981 is an apocalyptic number.

It is an amenable number.

10318501981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10318501981 is an equidigital number, since it uses as much as digits as its factorization.

10318501981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 37.

The spelling of 10318501981 in words is "ten billion, three hundred eighteen million, five hundred one thousand, nine hundred eighty-one".