1999100000002 has 16 divisors (see below), whose sum is σ = 3428228160000. Its totient is φ = 856457245728.

The previous prime is 1999099999937. The next prime is 1999100000021. The reversal of 1999100000002 is 2000000019991.

It is a self number, because there is not a number n which added to its sum of digits gives 1999100000002.

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, 24950002 + ... + 25029997.

It is an arithmetic number, because the mean of its divisors is an integer number (214264260000).

Almost surely, 2^{1999100000002} is an apocalyptic number.

1999100000002 is a deficient number, since it is larger than the sum of its proper divisors (1429128159998).

1999100000002 is a wasteful number, since it uses less digits than its factorization.

1999100000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49982865.

The product of its (nonzero) digits is 1458, while the sum is 31.

Adding to 1999100000002 its reverse (2000000019991), we get a palindrome (3999100019993).

The spelling of 1999100000002 in words is "one trillion, nine hundred ninety-nine billion, one hundred million, two", and thus it is an aban number.