168000019 has 4 divisors (see below), whose sum is σ = 183272760. Its totient is φ = 152727280.

The previous prime is 167999999. The next prime is 168000061. The reversal of 168000019 is 910000861.

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 168000019 - 2¹³ = 167991827 is a prime.

It is a super-2 number, since 2×168000019² = 56448012768000722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 167999957 and 168000002.

It is not an unprimeable number, because it can be changed into a prime (168009019) 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, 7636354 + ... + 7636375.

It is an arithmetic number, because the mean of its divisors is an integer number (45818190).

Almost surely, 2^168000019 is an apocalyptic number.

168000019 is a deficient number, since it is larger than the sum of its proper divisors (15272741).

168000019 is a wasteful number, since it uses less digits than its factorization.

168000019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15272740.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 168000019 is about 12961.4821297566. The cubic root of 168000019 is about 551.7848560776.

The spelling of 168000019 in words is "one hundred sixty-eight million, nineteen", and thus it is an aban number.