21301020030 has 64 divisors (see below), whose sum is σ = 51308974080. Its totient is φ = 5659593984.

The previous prime is 21301020017. The next prime is 21301020047. The reversal of 21301020030 is 3002010312.

It is a happy number.

It is a super-2 number, since 2×21301020030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21301019988 and 21301020015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13237866 + ... + 13239474.

It is an arithmetic number, because the mean of its divisors is an integer number (801702720).

Almost surely, 2^21301020030 is an apocalyptic number.

21301020030 is an abundant number, since it is smaller than the sum of its proper divisors (30007954050).

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

21301020030 is a wasteful number, since it uses less digits than its factorization.

21301020030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 21301020030 its reverse (3002010312), we get a palindrome (24303030342).

The spelling of 21301020030 in words is "twenty-one billion, three hundred one million, twenty thousand, thirty".