21234301244 has 24 divisors (see below), whose sum is σ = 40170678240. Its totient is φ = 9763176384.

The previous prime is 21234301241. The next prime is 21234301259. The reversal of 21234301244 is 44210343212.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234301241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 762659 + ... + 790010.

It is an arithmetic number, because the mean of its divisors is an integer number (1673778260).

Almost surely, 2^21234301244 is an apocalyptic number.

It is an amenable number.

21234301244 is a deficient number, since it is larger than the sum of its proper divisors (18936376996).

21234301244 is a wasteful number, since it uses less digits than its factorization.

21234301244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552949 (or 1552947 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21234301244 its reverse (44210343212), we get a palindrome (65444644456).

The spelling of 21234301244 in words is "twenty-one billion, two hundred thirty-four million, three hundred one thousand, two hundred forty-four".