19887486530 has 16 divisors (see below), whose sum is σ = 35799132600. Its totient is φ = 7954626432.

The previous prime is 19887486497. The next prime is 19887486581. The reversal of 19887486530 is 3568478891.

It is a happy number.

It is a Cunningham number, because it is equal to 141023²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7159359769 + 12728126761 = 84613^2 + 112819^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19887486530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317792 + ... + 375188.

Almost surely, 2^19887486530 is an apocalyptic number.

19887486530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19887486530 is a deficient number, since it is larger than the sum of its proper divisors (15911646070).

19887486530 is a wasteful number, since it uses less digits than its factorization.

19887486530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92053.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 19887486530 in words is "nineteen billion, eight hundred eighty-seven million, four hundred eighty-six thousand, five hundred thirty".