30198023 has 4 divisors (see below), whose sum is σ = 30323568. Its totient is φ = 30072480.

The previous prime is 30198013. The next prime is 30198043. The reversal of 30198023 is 32089103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32089103 = 883 ⋅36341.

It is a cyclic number.

It is not a de Polignac number, because 30198023 - 2¹⁸ = 29935879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30197983 and 30198001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30198013) 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, 62411 + ... + 62892.

It is an arithmetic number, because the mean of its divisors is an integer number (7580892).

Almost surely, 2^30198023 is an apocalyptic number.

30198023 is a deficient number, since it is larger than the sum of its proper divisors (125545).

30198023 is a wasteful number, since it uses less digits than its factorization.

30198023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125544.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 30198023 is about 5495.2727866777. The cubic root of 30198023 is about 311.4054223959.

The spelling of 30198023 in words is "thirty million, one hundred ninety-eight thousand, twenty-three".