102018805 has 16 divisors (see below), whose sum is σ = 143694720. Its totient is φ = 68064192.

The previous prime is 102018803. The next prime is 102018827. The reversal of 102018805 is 508810201.

It is not a de Polignac number, because 102018805 - 2¹ = 102018803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102018805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102018803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38095 + ... + 40684.

It is an arithmetic number, because the mean of its divisors is an integer number (8980920).

Almost surely, 2^102018805 is an apocalyptic number.

It is an amenable number.

102018805 is a deficient number, since it is larger than the sum of its proper divisors (41675915).

102018805 is an equidigital number, since it uses as much as digits as its factorization.

102018805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78828.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 102018805 is about 10100.4358816835. The cubic root of 102018805 is about 467.2615845162.

The spelling of 102018805 in words is "one hundred two million, eighteen thousand, eight hundred five".