19131795036 has 72 divisors (see below), whose sum is σ = 51249560544. Its totient is φ = 5996989440.

The previous prime is 19131794977. The next prime is 19131795037. The reversal of 19131795036 is 63059713191.

It is a happy number.

19131795036 is a `hidden beast` number, since 1 + 9 + 131 + 7 + 9 + 503 + 6 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19131794982 and 19131795000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19131795037) 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, 735696 + ... + 761256.

It is an arithmetic number, because the mean of its divisors is an integer number (711799452).

Almost surely, 2^19131795036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19131795036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25624780272).

19131795036 is an abundant number, since it is smaller than the sum of its proper divisors (32117765508).

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

19131795036 is a wasteful number, since it uses less digits than its factorization.

19131795036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26811 (or 26806 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The spelling of 19131795036 in words is "nineteen billion, one hundred thirty-one million, seven hundred ninety-five thousand, thirty-six".