10218985939 has 2 divisors, whose sum is σ = 10218985940. Its totient is φ = 10218985938.

The previous prime is 10218985913. The next prime is 10218985961. The reversal of 10218985939 is 93958981201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10218985939 - 2³¹ = 8071502291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10218985939.

It is not a weakly prime, because it can be changed into another prime (10218985639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5109492969 + 5109492970.

It is an arithmetic number, because the mean of its divisors is an integer number (5109492970).

Almost surely, 2^10218985939 is an apocalyptic number.

10218985939 is a deficient number, since it is larger than the sum of its proper divisors (1).

10218985939 is an equidigital number, since it uses as much as digits as its factorization.

10218985939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 55.

The spelling of 10218985939 in words is "ten billion, two hundred eighteen million, nine hundred eighty-five thousand, nine hundred thirty-nine".