19818086392 has 64 divisors (see below), whose sum is σ = 40712414400. Its totient is φ = 8989178880.

The previous prime is 19818086389. The next prime is 19818086399. The reversal of 19818086392 is 29368081891.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19818086399) 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, 1539342 + ... + 1552162.

It is an arithmetic number, because the mean of its divisors is an integer number (636131475).

Almost surely, 2^19818086392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19818086392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20356207200).

19818086392 is an abundant number, since it is smaller than the sum of its proper divisors (20894328008).

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

19818086392 is a wasteful number, since it uses less digits than its factorization.

19818086392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13096 (or 13092 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 19818086392 in words is "nineteen billion, eight hundred eighteen million, eighty-six thousand, three hundred ninety-two".