34720531818 has 48 divisors (see below), whose sum is σ = 80795776320. Its totient is φ = 9918015744.

The previous prime is 34720531721. The next prime is 34720531841. The reversal of 34720531818 is 81813502743.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 34720531818.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1787563 + ... + 1806881.

It is an arithmetic number, because the mean of its divisors is an integer number (1683245340).

Almost surely, 2^34720531818 is an apocalyptic number.

34720531818 is an abundant number, since it is smaller than the sum of its proper divisors (46075244502).

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

34720531818 is a wasteful number, since it uses less digits than its factorization.

34720531818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25451 (or 25444 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 34720531818 in words is "thirty-four billion, seven hundred twenty million, five hundred thirty-one thousand, eight hundred eighteen".