1000019999999 has 4 divisors (see below), whose sum is σ = 1000074792864. Its totient is φ = 999965207136.

The previous prime is 1000019999989. The next prime is 1000020000013. The reversal of 1000019999999 is 9999999100001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1000019999999 - 2²⁰ = 1000018951423 is a prime.

It is a Duffinian number.

1000019999999 is a modest number, since divided by 9999999 gives 100001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000019999989) 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, 27369047 + ... + 27405560.

It is an arithmetic number, because the mean of its divisors is an integer number (250018698216).

Almost surely, 2^{1000019999999} is an apocalyptic number.

1000019999999 is a deficient number, since it is larger than the sum of its proper divisors (54792865).

1000019999999 is an equidigital number, since it uses as much as digits as its factorization.

1000019999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54792864.

The product of its (nonzero) digits is 4782969, while the sum is 65.

The spelling of 1000019999999 in words is "one trillion, nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-nine".