19919100002 has 16 divisors (see below), whose sum is σ = 30001950720. Its totient is φ = 9918529152.

The previous prime is 19919100001. The next prime is 19919100011. The reversal of 19919100002 is 20000191991.

It is not an unprimeable number, because it can be changed into a prime (19919100001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496199 + ... + 534837.

It is an arithmetic number, because the mean of its divisors is an integer number (1875121920).

Almost surely, 2^19919100002 is an apocalyptic number.

19919100002 is a deficient number, since it is larger than the sum of its proper divisors (10082850718).

19919100002 is a wasteful number, since it uses less digits than its factorization.

19919100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39697.

The product of its (nonzero) digits is 1458, while the sum is 32.

Adding to 19919100002 its reverse (20000191991), we get a palindrome (39919291993).

The spelling of 19919100002 in words is "nineteen billion, nine hundred nineteen million, one hundred thousand, two".