21240332030 has 24 divisors (see below), whose sum is σ = 39142439352. Its totient is φ = 8298541104.

The previous prime is 21240331991. The next prime is 21240332033. The reversal of 21240332030 is 3023304212.

It is a junction number, because it is equal to n+sod(n) for n = 21240331993 and 21240332011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21240332033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555884 + ... + 592863.

It is an arithmetic number, because the mean of its divisors is an integer number (1630934973).

Almost surely, 2^21240332030 is an apocalyptic number.

21240332030 is a deficient number, since it is larger than the sum of its proper divisors (17902107322).

21240332030 is a wasteful number, since it uses less digits than its factorization.

21240332030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148840 (or 1148797 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21240332030 its reverse (3023304212), we get a palindrome (24263636242).

The spelling of 21240332030 in words is "twenty-one billion, two hundred forty million, three hundred thirty-two thousand, thirty".