20123030 has 32 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 7716960.

The previous prime is 20123029. The next prime is 20123039. The reversal of 20123030 is 3032102.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42857 + ... + 43323.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^20123030 is an apocalyptic number.

20123030 is a deficient number, since it is larger than the sum of its proper divisors (17616490).

20123030 is a wasteful number, since it uses less digits than its factorization.

20123030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 20123030 is about 4485.8700382423. The cubic root of 20123030 is about 271.9972155857.

Adding to 20123030 its reverse (3032102), we get a palindrome (23155132).

The spelling of 20123030 in words is "twenty million, one hundred twenty-three thousand, thirty".