21331302030 has 48 divisors (see below), whose sum is σ = 56641425984. Its totient is φ = 5567317440.

The previous prime is 21331302029. The next prime is 21331302043. The reversal of 21331302030 is 3020313312.

21331302030 is a `hidden beast` number, since 2 + 1 + 331 + 302 + 0 + 30 = 666.

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 = 21331301994 and 21331302012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2517201 + ... + 2525660.

It is an arithmetic number, because the mean of its divisors is an integer number (1180029708).

Almost surely, 2^21331302030 is an apocalyptic number.

21331302030 is an abundant number, since it is smaller than the sum of its proper divisors (35310123954).

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

21331302030 is a wasteful number, since it uses less digits than its factorization.

21331302030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5042921 (or 5042918 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21331302030 its reverse (3020313312), we get a palindrome (24351615342).

The spelling of 21331302030 in words is "twenty-one billion, three hundred thirty-one million, three hundred two thousand, thirty".