19861739292 has 24 divisors (see below), whose sum is σ = 46349220736. Its totient is φ = 6619842288.

The previous prime is 19861739273. The next prime is 19861739299. The reversal of 19861739292 is 29293716891.

It is a super-2 number, since 2×19861739292² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19861739299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26103 + ... + 201009.

Almost surely, 2^19861739292 is an apocalyptic number.

19861739292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19861739292 is an abundant number, since it is smaller than the sum of its proper divisors (26487481444).

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

19861739292 is a wasteful number, since it uses less digits than its factorization.

19861739292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184377 (or 184375 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 57.

The spelling of 19861739292 in words is "nineteen billion, eight hundred sixty-one million, seven hundred thirty-nine thousand, two hundred ninety-two".