19405596349 has 16 divisors (see below), whose sum is σ = 20653341696. Its totient is φ = 18200678400.

The previous prime is 19405596347. The next prime is 19405596403. The reversal of 19405596349 is 94369550491.

It is a cyclic number.

It is not a de Polignac number, because 19405596349 - 2¹ = 19405596347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19405596349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19405596341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261864 + ... + 327694.

It is an arithmetic number, because the mean of its divisors is an integer number (1290833856).

Almost surely, 2^19405596349 is an apocalyptic number.

It is an amenable number.

19405596349 is a deficient number, since it is larger than the sum of its proper divisors (1247745347).

19405596349 is a wasteful number, since it uses less digits than its factorization.

19405596349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66156.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 19405596349 in words is "nineteen billion, four hundred five million, five hundred ninety-six thousand, three hundred forty-nine".