19541861136 has 60 divisors (see below), whose sum is σ = 62502940032. Its totient is φ = 5583388608.

The previous prime is 19541861117. The next prime is 19541861137. The reversal of 19541861136 is 63116814591.

19541861136 is a `hidden beast` number, since 19 + 5 + 4 + 18 + 611 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19541861091 and 19541861100.

It is not an unprimeable number, because it can be changed into a prime (19541861137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9692376 + ... + 9694391.

Almost surely, 2^19541861136 is an apocalyptic number.

19541861136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19541861136 is an abundant number, since it is smaller than the sum of its proper divisors (42961078896).

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

19541861136 is a wasteful number, since it uses less digits than its factorization.

19541861136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19386788 (or 19386779 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The spelling of 19541861136 in words is "nineteen billion, five hundred forty-one million, eight hundred sixty-one thousand, one hundred thirty-six".