19818018036 has 48 divisors (see below), whose sum is σ = 51475170880. Its totient is φ = 6593775840.

The previous prime is 19818018029. The next prime is 19818018037. The reversal of 19818018036 is 63081081891.

It is a junction number, because it is equal to n+sod(n) for n = 19818017982 and 19818018000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19818018037) 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, 111166 + ... + 228021.

Almost surely, 2^19818018036 is an apocalyptic number.

It is an amenable number.

19818018036 is an abundant number, since it is smaller than the sum of its proper divisors (31657152844).

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

19818018036 is a wasteful number, since it uses less digits than its factorization.

19818018036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339741 (or 339733 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 19818018036 in words is "nineteen billion, eight hundred eighteen million, eighteen thousand, thirty-six".