19767235216 has 15 divisors (see below), whose sum is σ = 38300107881. Its totient is φ = 9883336416.

The previous prime is 19767235177. The next prime is 19767235217. The reversal of 19767235216 is 61253276791.

The square root of 19767235216 is 140596.

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

It can be written as a sum of positive squares in only one way, i.e., 15474364816 + 4292870400 = 124396^2 + 65520^2 .

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 19767235216.

It is not an unprimeable number, because it can be changed into a prime (19767235217) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 544810 + ... + 579958.

Almost surely, 2^19767235216 is an apocalyptic number.

19767235216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

19767235216 is the 140596-th square number.

It is an amenable number.

19767235216 is a deficient number, since it is larger than the sum of its proper divisors (18532872665).

19767235216 is an frugal number, since it uses more digits than its factorization.

19767235216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70306 (or 35151 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

Multiplying 19767235216 by its sum of digits (49), we get a square (968594525584 = 984172²).

The spelling of 19767235216 in words is "nineteen billion, seven hundred sixty-seven million, two hundred thirty-five thousand, two hundred sixteen".