21301320030 has 32 divisors (see below), whose sum is σ = 51739115904. Its totient is φ = 5611913376.

The previous prime is 21301320013. The next prime is 21301320083. The reversal of 21301320030 is 3002310312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 21301319991 and 21301320009.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4274884 + ... + 4279863.

It is an arithmetic number, because the mean of its divisors is an integer number (1616847372).

Almost surely, 2^21301320030 is an apocalyptic number.

21301320030 is an abundant number, since it is smaller than the sum of its proper divisors (30437795874).

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

21301320030 is a wasteful number, since it uses less digits than its factorization.

21301320030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8554840.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21301320030 its reverse (3002310312), we get a palindrome (24303630342).

The spelling of 21301320030 in words is "twenty-one billion, three hundred one million, three hundred twenty thousand, thirty".