19000012001 has 4 divisors (see below), whose sum is σ = 19260286212. Its totient is φ = 18739737792.

The previous prime is 19000011997. The next prime is 19000012021. The reversal of 19000012001 is 10021000091.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3699558976 + 15300453025 = 60824^2 + 123695^2 .

It is a cyclic number.

It is not a de Polignac number, because 19000012001 - 2² = 19000011997 is a prime.

It is a super-2 number, since 2×19000012001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19000012021) 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, 130136996 + ... + 130137141.

It is an arithmetic number, because the mean of its divisors is an integer number (4815071553).

Almost surely, 2^19000012001 is an apocalyptic number.

It is an amenable number.

19000012001 is a deficient number, since it is larger than the sum of its proper divisors (260274211).

19000012001 is an equidigital number, since it uses as much as digits as its factorization.

19000012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260274210.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 19000012001 its reverse (10021000091), we get a palindrome (29021012092).

The spelling of 19000012001 in words is "nineteen billion, twelve thousand, one".