19819818000216 has 96 divisors (see below), whose sum is σ = 57841164304560. Its totient is φ = 6094886052096.

The previous prime is 19819818000209. The next prime is 19819818000217. The reversal of 19819818000216 is 61200081891891.

It is a super-2 number, since 2×19819818000216² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19819818000217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4487266 + ... + 7731441.

Almost surely, 2^{19819818000216} is an apocalyptic number.

It is an amenable number.

19819818000216 is an abundant number, since it is smaller than the sum of its proper divisors (38021346304344).

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

19819818000216 is a wasteful number, since it uses less digits than its factorization.

19819818000216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12220465 (or 12220458 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 54.

The spelling of 19819818000216 in words is "nineteen trillion, eight hundred nineteen billion, eight hundred eighteen million, two hundred sixteen", and thus it is an aban number.