19673642930 has 16 divisors (see below), whose sum is σ = 36080719704. Its totient is φ = 7720976640.

The previous prime is 19673642899. The next prime is 19673642939. The reversal of 19673642930 is 3924637691.

It can be written as a sum of positive squares in 4 ways, for example, as 18382749889 + 1290893041 = 135583^2 + 35929^2 .

It is a super-2 number, since 2×19673642930² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19673642939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18559511 + ... + 18560570.

Almost surely, 2^19673642930 is an apocalyptic number.

19673642930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19673642930 is a deficient number, since it is larger than the sum of its proper divisors (16407076774).

19673642930 is a wasteful number, since it uses less digits than its factorization.

19673642930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37120141.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 19673642930 in words is "nineteen billion, six hundred seventy-three million, six hundred forty-two thousand, nine hundred thirty".