19870161284 has 12 divisors (see below), whose sum is σ = 34774100508. Its totient is φ = 9934704000.

The previous prime is 19870161277. The next prime is 19870161287. The reversal of 19870161284 is 48216107891.

It can be written as a sum of positive squares in 2 ways, for example, as 10387686400 + 9482474884 = 101920^2 + 97378^2 .

It is not an unprimeable number, because it can be changed into a prime (19870161287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48584 + ... + 205184.

It is an arithmetic number, because the mean of its divisors is an integer number (2897841709).

Almost surely, 2^19870161284 is an apocalyptic number.

It is an amenable number.

19870161284 is a deficient number, since it is larger than the sum of its proper divisors (14903939224).

19870161284 is a wasteful number, since it uses less digits than its factorization.

19870161284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188326 (or 188324 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The spelling of 19870161284 in words is "nineteen billion, eight hundred seventy million, one hundred sixty-one thousand, two hundred eighty-four".