19351035664 has 45 divisors (see below), whose sum is σ = 38040580903. Its totient is φ = 9536131616.

The previous prime is 19351035647. The next prime is 19351035709. The reversal of 19351035664 is 46653015391.

It is a happy number.

The square root of 19351035664 is 139108.

It is a perfect power (a square), and thus also a powerful number.

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 19351035664.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 46183647 + ... + 46184065.

Almost surely, 2^19351035664 is an apocalyptic number.

19351035664 is the 139108-th square number.

It is an amenable number.

19351035664 is a deficient number, since it is larger than the sum of its proper divisors (18689545239).

19351035664 is an frugal number, since it uses more digits than its factorization.

19351035664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 19351035664 in words is "nineteen billion, three hundred fifty-one million, thirty-five thousand, six hundred sixty-four".