30820023 has 36 divisors (see below), whose sum is σ = 50358672. Its totient is φ = 18120960.

The previous prime is 30820019. The next prime is 30820051. The reversal of 30820023 is 32002803.

It is not a de Polignac number, because 30820023 - 2² = 30820019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30819978 and 30820005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30820003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34543 + ... + 35423.

It is an arithmetic number, because the mean of its divisors is an integer number (1398852).

Almost surely, 2^30820023 is an apocalyptic number.

30820023 is a deficient number, since it is larger than the sum of its proper divisors (19538649).

30820023 is a wasteful number, since it uses less digits than its factorization.

30820023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30820023 is about 5551.5784241961. The cubic root of 30820023 is about 313.5289534701.

Adding to 30820023 its reverse (32002803), we get a palindrome (62822826).

The spelling of 30820023 in words is "thirty million, eight hundred twenty thousand, twenty-three".