19431995941 has 4 divisors (see below), whose sum is σ = 19433594092. Its totient is φ = 19430397792.

The previous prime is 19431995929. The next prime is 19431995959. The reversal of 19431995941 is 14959913491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10469587041 + 8962408900 = 102321^2 + 94670^2 .

It is a cyclic number.

It is not a de Polignac number, because 19431995941 - 2⁵ = 19431995909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19431995641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780696 + ... + 805201.

It is an arithmetic number, because the mean of its divisors is an integer number (4858398523).

Almost surely, 2^19431995941 is an apocalyptic number.

It is an amenable number.

19431995941 is a deficient number, since it is larger than the sum of its proper divisors (1598151).

19431995941 is a wasteful number, since it uses less digits than its factorization.

19431995941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598150.

The product of its digits is 1574640, while the sum is 55.

The spelling of 19431995941 in words is "nineteen billion, four hundred thirty-one million, nine hundred ninety-five thousand, nine hundred forty-one".