18851670340 has 12 divisors (see below), whose sum is σ = 39588507756. Its totient is φ = 7540668128.

The previous prime is 18851670337. The next prime is 18851670361. The reversal of 18851670340 is 4307615881.

It can be written as a sum of positive squares in 2 ways, for example, as 2787628804 + 16064041536 = 52798^2 + 126744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471291739 + ... + 471291778.

It is an arithmetic number, because the mean of its divisors is an integer number (3299042313).

Almost surely, 2^18851670340 is an apocalyptic number.

18851670340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18851670340 is an abundant number, since it is smaller than the sum of its proper divisors (20736837416).

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

18851670340 is a wasteful number, since it uses less digits than its factorization.

18851670340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942583526 (or 942583524 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 18851670340 in words is "eighteen billion, eight hundred fifty-one million, six hundred seventy thousand, three hundred forty".