18312021282 has 32 divisors (see below), whose sum is σ = 37117206720. Its totient is φ = 6022352960.

The previous prime is 18312021199. The next prime is 18312021283. The reversal of 18312021282 is 28212021381.

It is not an unprimeable number, because it can be changed into a prime (18312021283) 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, 68644 + ... + 203312.

It is an arithmetic number, because the mean of its divisors is an integer number (1159912710).

Almost surely, 2^18312021282 is an apocalyptic number.

18312021282 is an abundant number, since it is smaller than the sum of its proper divisors (18805185438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18312021282 is a wasteful number, since it uses less digits than its factorization.

18312021282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134978.

The product of its (nonzero) digits is 3072, while the sum is 30.

Subtracting 18312021282 from its reverse (28212021381), we obtain a palindrome (9900000099).

It can be divided in two parts, 183120 and 21282, that added together give a palindrome (204402).

The spelling of 18312021282 in words is "eighteen billion, three hundred twelve million, twenty-one thousand, two hundred eighty-two".