19715548068 has 60 divisors (see below), whose sum is σ = 52119518220. Its totient is φ = 6497998848.

The previous prime is 19715548067. The next prime is 19715548093. The reversal of 19715548068 is 86084551791.

It is a happy number.

19715548068 is a `hidden beast` number, since 1 + 9 + 7 + 1 + 554 + 80 + 6 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1872465984 + 17843082084 = 43272^2 + 133578^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (19715548063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 313021 + ... + 370692.

It is an arithmetic number, because the mean of its divisors is an integer number (868658637).

Almost surely, 2^19715548068 is an apocalyptic number.

19715548068 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19715548068 is an abundant number, since it is smaller than the sum of its proper divisors (32403970152).

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

19715548068 is a wasteful number, since it uses less digits than its factorization.

19715548068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683818 (or 683807 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 19715548068 in words is "nineteen billion, seven hundred fifteen million, five hundred forty-eight thousand, sixty-eight".