21110242344 has 32 divisors (see below), whose sum is σ = 52779492000. Its totient is φ = 7036229312.

The previous prime is 21110242343. The next prime is 21110242357. The reversal of 21110242344 is 44324201112.

It is a super-2 number, since 2×21110242344² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21110242343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442402 + ... + 487790.

It is an arithmetic number, because the mean of its divisors is an integer number (1649359125).

Almost surely, 2^21110242344 is an apocalyptic number.

21110242344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21110242344 is an abundant number, since it is smaller than the sum of its proper divisors (31669249656).

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

21110242344 is a wasteful number, since it uses less digits than its factorization.

21110242344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64777 (or 64773 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21110242344 its reverse (44324201112), we get a palindrome (65434443456).

The spelling of 21110242344 in words is "twenty-one billion, one hundred ten million, two hundred forty-two thousand, three hundred forty-four".