19400841841 has 4 divisors (see below), whose sum is σ = 20421938800. Its totient is φ = 18379744884.

The previous prime is 19400841839. The next prime is 19400841857. The reversal of 19400841841 is 14814800491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19400841841 - 2¹ = 19400841839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19400841794 and 19400841803.

It is not an unprimeable number, because it can be changed into a prime (19400841821) 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, 510548451 + ... + 510548488.

It is an arithmetic number, because the mean of its divisors is an integer number (5105484700).

Almost surely, 2^19400841841 is an apocalyptic number.

It is an amenable number.

19400841841 is a deficient number, since it is larger than the sum of its proper divisors (1021096959).

19400841841 is a wasteful number, since it uses less digits than its factorization.

19400841841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021096958.

The product of its (nonzero) digits is 36864, while the sum is 40.

The spelling of 19400841841 in words is "nineteen billion, four hundred million, eight hundred forty-one thousand, eight hundred forty-one".