102018851 has 6 divisors (see below), whose sum is σ = 112136556. Its totient is φ = 92744300.

The previous prime is 102018827. The next prime is 102018859. The reversal of 102018851 is 158810201.

It is a de Polignac number, because none of the positive numbers 2^k-102018851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102018851.

It is not an unprimeable number, because it can be changed into a prime (102018859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421445 + ... + 421686.

It is an arithmetic number, because the mean of its divisors is an integer number (18689426).

Almost surely, 2^102018851 is an apocalyptic number.

102018851 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102018851 is a deficient number, since it is larger than the sum of its proper divisors (10117705).

102018851 is an equidigital number, since it uses as much as digits as its factorization.

102018851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843153 (or 843142 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 102018851 is about 10100.4381588127. The cubic root of 102018851 is about 467.2616547451.

The spelling of 102018851 in words is "one hundred two million, eighteen thousand, eight hundred fifty-one".