19077686884 has 9 divisors (see below), whose sum is σ = 33386435481. Its totient is φ = 9538705320.

The previous prime is 19077686869. The next prime is 19077686897. The reversal of 19077686884 is 48868677091.

The square root of 19077686884 is 138122.

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., 12516686884 + 6561000000 = 111878^2 + 81000^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 241714 + ... + 310774.

Almost surely, 2^19077686884 is an apocalyptic number.

19077686884 is the 138122-nd square number.

It is an amenable number.

19077686884 is a deficient number, since it is larger than the sum of its proper divisors (14308748597).

19077686884 is an frugal number, since it uses more digits than its factorization.

19077686884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138126 (or 69063 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 64.

Multiplying 19077686884 by its sum of digits (64), we get a square (1220971960576 = 1104976²).

The spelling of 19077686884 in words is "nineteen billion, seventy-seven million, six hundred eighty-six thousand, eight hundred eighty-four".