19852788530 has 48 divisors (see below), whose sum is σ = 38014348680. Its totient is φ = 7463436288.

The previous prime is 19852788517. The next prime is 19852788541. The reversal of 19852788530 is 3588725891.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 3519692929 + 16333095601 = 59327^2 + 127801^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2217944 + ... + 2226876.

Almost surely, 2^19852788530 is an apocalyptic number.

19852788530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19852788530 is a deficient number, since it is larger than the sum of its proper divisors (18161560150).

19852788530 is a wasteful number, since it uses less digits than its factorization.

19852788530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9743 (or 9726 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 19852788530 in words is "nineteen billion, eight hundred fifty-two million, seven hundred eighty-eight thousand, five hundred thirty".