20321000030 has 16 divisors (see below), whose sum is σ = 37757729664. Its totient is φ = 7866193440.

The previous prime is 20320999943. The next prime is 20321000033. The reversal of 20321000030 is 3000012302.

It is a junction number, because it is equal to n+sod(n) for n = 20320999975 and 20321000020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321000033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32775497 + ... + 32776116.

It is an arithmetic number, because the mean of its divisors is an integer number (2359858104).

Almost surely, 2^20321000030 is an apocalyptic number.

20321000030 is a deficient number, since it is larger than the sum of its proper divisors (17436729634).

20321000030 is a wasteful number, since it uses less digits than its factorization.

20321000030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65551651.

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

Adding to 20321000030 its reverse (3000012302), we get a palindrome (23321012332).

The spelling of 20321000030 in words is "twenty billion, three hundred twenty-one million, thirty", and thus it is an aban number.