19838872861 has 8 divisors (see below), whose sum is σ = 20378302560. Its totient is φ = 19299613968.

The previous prime is 19838872849. The next prime is 19838872877. The reversal of 19838872861 is 16827883891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19838872861 - 2⁵ = 19838872829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19838872861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19838872061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213330 + ... + 291868.

It is an arithmetic number, because the mean of its divisors is an integer number (2547287820).

Almost surely, 2^19838872861 is an apocalyptic number.

It is an amenable number.

19838872861 is a deficient number, since it is larger than the sum of its proper divisors (539429699).

19838872861 is an equidigital number, since it uses as much as digits as its factorization.

19838872861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85403.

The product of its digits is 9289728, while the sum is 61.

The spelling of 19838872861 in words is "nineteen billion, eight hundred thirty-eight million, eight hundred seventy-two thousand, eight hundred sixty-one".