21303234042044 has 12 divisors (see below), whose sum is σ = 37325958072144. Its totient is φ = 10638674592864.

The previous prime is 21303234041951. The next prime is 21303234042059. The reversal of 21303234042044 is 44024043230312.

It is a self number, because there is not a number n which added to its sum of digits gives 21303234042044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3235603337 + ... + 3235609920.

It is an arithmetic number, because the mean of its divisors is an integer number (3110496506012).

Almost surely, 2^{21303234042044} is an apocalyptic number.

It is an amenable number.

21303234042044 is a deficient number, since it is larger than the sum of its proper divisors (16022724030100).

21303234042044 is a wasteful number, since it uses less digits than its factorization.

21303234042044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6471214084 (or 6471214082 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 21303234042044 its reverse (44024043230312), we get a palindrome (65327277272356).

The spelling of 21303234042044 in words is "twenty-one trillion, three hundred three billion, two hundred thirty-four million, forty-two thousand, forty-four".