19338036861 has 16 divisors (see below), whose sum is σ = 30291750720. Its totient is φ = 10818481920.

The previous prime is 19338036859. The next prime is 19338036929. The reversal of 19338036861 is 16863083391.

It is a happy number.

It is not a de Polignac number, because 19338036861 - 2¹ = 19338036859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19338036861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19338036821) 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, 22538076 + ... + 22538933.

It is an arithmetic number, because the mean of its divisors is an integer number (1893234420).

Almost surely, 2^19338036861 is an apocalyptic number.

19338036861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19338036861 is a deficient number, since it is larger than the sum of its proper divisors (10953713859).

19338036861 is a wasteful number, since it uses less digits than its factorization.

19338036861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45077036.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 19338036861 in words is "nineteen billion, three hundred thirty-eight million, thirty-six thousand, eight hundred sixty-one".