19361816369 has 32 divisors (see below), whose sum is σ = 23601217536. Its totient is φ = 15526304640.

The previous prime is 19361816329. The next prime is 19361816381. The reversal of 19361816369 is 96361816391.

It is not a de Polignac number, because 19361816369 - 2²⁰ = 19360767793 is a prime.

It is a super-2 number, since 2×19361816369² (a number of 21 digits) contains 22 as substring.

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 19361816369.

It is not an unprimeable number, because it can be changed into a prime (19361816329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1445069 + ... + 1458405.

It is an arithmetic number, because the mean of its divisors is an integer number (737538048).

Almost surely, 2^19361816369 is an apocalyptic number.

It is an amenable number.

19361816369 is a deficient number, since it is larger than the sum of its proper divisors (4239401167).

19361816369 is a wasteful number, since it uses less digits than its factorization.

19361816369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13565.

The product of its digits is 1259712, while the sum is 53.

The spelling of 19361816369 in words is "nineteen billion, three hundred sixty-one million, eight hundred sixteen thousand, three hundred sixty-nine".