19442793771 has 28 divisors (see below), whose sum is σ = 29423411352. Its totient is φ = 12840672096.

The previous prime is 19442793751. The next prime is 19442793823. The reversal of 19442793771 is 17739724491.

It is a happy number.

It is not a de Polignac number, because 19442793771 - 2⁵ = 19442793739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19442793701) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 46626 + ... + 202631.

Almost surely, 2^19442793771 is an apocalyptic number.

19442793771 is a deficient number, since it is larger than the sum of its proper divisors (9980617581).

19442793771 is an equidigital number, since it uses as much as digits as its factorization.

19442793771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249382 (or 249367 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The spelling of 19442793771 in words is "nineteen billion, four hundred forty-two million, seven hundred ninety-three thousand, seven hundred seventy-one".