102989444918 has 4 divisors (see below), whose sum is σ = 154484167380. Its totient is φ = 51494722458.

The previous prime is 102989444911. The next prime is 102989444923. The reversal of 102989444918 is 819444989201.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102989444911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25747361228 + ... + 25747361231.

It is an arithmetic number, because the mean of its divisors is an integer number (38621041845).

Almost surely, 2^102989444918 is an apocalyptic number.

102989444918 is a deficient number, since it is larger than the sum of its proper divisors (51494722462).

102989444918 is an equidigital number, since it uses as much as digits as its factorization.

102989444918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51494722461.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The spelling of 102989444918 in words is "one hundred two billion, nine hundred eighty-nine million, four hundred forty-four thousand, nine hundred eighteen".