102138316918 has 36 divisors (see below), whose sum is σ = 170072527716. Its totient is φ = 45624535200.

The previous prime is 102138316849. The next prime is 102138316919. The reversal of 102138316918 is 819613831201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102138316919) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91439296 + ... + 91440412.

It is an arithmetic number, because the mean of its divisors is an integer number (4724236881).

Almost surely, 2^102138316918 is an apocalyptic number.

102138316918 is a deficient number, since it is larger than the sum of its proper divisors (67934210798).

102138316918 is an frugal number, since it uses more digits than its factorization.

102138316918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

It can be divided in two parts, 1021383 and 16918, that added together give a palindrome (1038301).

The spelling of 102138316918 in words is "one hundred two billion, one hundred thirty-eight million, three hundred sixteen thousand, nine hundred eighteen".