23820030 has 48 divisors (see below), whose sum is σ = 66699360. Its totient is φ = 5863104.

The previous prime is 23820007. The next prime is 23820037. The reversal of 23820030 is 3002832.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23819985 and 23820012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23820037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9010 + ... + 11349.

It is an arithmetic number, because the mean of its divisors is an integer number (1389570).

Almost surely, 2^23820030 is an apocalyptic number.

23820030 is an abundant number, since it is smaller than the sum of its proper divisors (42879330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23820030 is a wasteful number, since it uses less digits than its factorization.

23820030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20385 (or 20382 counting only the distinct ones).

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

The square root of 23820030 is about 4880.5768101732. The cubic root of 23820030 is about 287.7270997070.

Adding to 23820030 its reverse (3002832), we get a palindrome (26822862).

The spelling of 23820030 in words is "twenty-three million, eight hundred twenty thousand, thirty".