19861047294 has 32 divisors (see below), whose sum is σ = 44504366976. Its totient is φ = 5855836320.

The previous prime is 19861047289. The next prime is 19861047307. The reversal of 19861047294 is 49274016891.

It is a super-2 number, since 2×19861047294² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4064112 + ... + 4068995.

It is an arithmetic number, because the mean of its divisors is an integer number (1390761468).

Almost surely, 2^19861047294 is an apocalyptic number.

19861047294 is an abundant number, since it is smaller than the sum of its proper divisors (24643319682).

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

19861047294 is a wasteful number, since it uses less digits than its factorization.

19861047294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8133160.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 19861047294 in words is "nineteen billion, eight hundred sixty-one million, forty-seven thousand, two hundred ninety-four".