19677774852 has 60 divisors (see below), whose sum is σ = 51455131420. Its totient is φ = 6557531904.

The previous prime is 19677774833. The next prime is 19677774877. The reversal of 19677774852 is 25847777691.

19677774852 is a `hidden beast` number, since 19 + 6 + 77 + 77 + 485 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10686183876 + 8991590976 = 103374^2 + 94824^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 19677774852.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2009424 + ... + 2019192.

Almost surely, 2^19677774852 is an apocalyptic number.

19677774852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19677774852 is an abundant number, since it is smaller than the sum of its proper divisors (31777356568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19677774852 is a wasteful number, since it uses less digits than its factorization.

19677774852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16002 (or 15991 counting only the distinct ones).

The product of its digits is 41489280, while the sum is 63.

The spelling of 19677774852 in words is "nineteen billion, six hundred seventy-seven million, seven hundred seventy-four thousand, eight hundred fifty-two".