19912130002 has 8 divisors (see below), whose sum is σ = 30163920012. Its totient is φ = 9857490000.

The previous prime is 19912129997. The next prime is 19912130003. The reversal of 19912130002 is 20003121991.

It can be written as a sum of positive squares in 2 ways, for example, as 19718057241 + 194072761 = 140421^2 + 13931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (19912130003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49287249 + ... + 49287652.

Almost surely, 2^19912130002 is an apocalyptic number.

19912130002 is a deficient number, since it is larger than the sum of its proper divisors (10251790010).

19912130002 is a wasteful number, since it uses less digits than its factorization.

19912130002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98575004.

The product of its (nonzero) digits is 972, while the sum is 28.

Adding to 19912130002 its reverse (20003121991), we get a palindrome (39915251993).

The spelling of 19912130002 in words is "nineteen billion, nine hundred twelve million, one hundred thirty thousand, two".