30102019 has 4 divisors (see below), whose sum is σ = 31872744. Its totient is φ = 28331296.

The previous prime is 30101999. The next prime is 30102031. The reversal of 30102019 is 91020103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91020103 = 67 ⋅1358509.

It is a cyclic number.

It is not a de Polignac number, because 30102019 - 2⁷ = 30101891 is a prime.

It is a super-2 number, since 2×30102019² = 1812263095752722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30101993 and 30102011.

It is not an unprimeable number, because it can be changed into a prime (30102089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885337 + ... + 885370.

It is an arithmetic number, because the mean of its divisors is an integer number (7968186).

Almost surely, 2^30102019 is an apocalyptic number.

30102019 is a deficient number, since it is larger than the sum of its proper divisors (1770725).

30102019 is a wasteful number, since it uses less digits than its factorization.

30102019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770724.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 30102019 is about 5486.5306888780. The cubic root of 30102019 is about 311.0750707070.

The spelling of 30102019 in words is "thirty million, one hundred two thousand, nineteen".