21344011040 has 96 divisors (see below), whose sum is σ = 57401156736. Its totient is φ = 7423989760.

The previous prime is 21344011009. The next prime is 21344011069. The reversal of 21344011040 is 4011044312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223157 + ... + 304116.

It is an arithmetic number, because the mean of its divisors is an integer number (597928716).

Almost surely, 2^21344011040 is an apocalyptic number.

21344011040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21344011040 is an abundant number, since it is smaller than the sum of its proper divisors (36057145696).

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

21344011040 is a wasteful number, since it uses less digits than its factorization.

21344011040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527322 (or 527314 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21344011040 its reverse (4011044312), we get a palindrome (25355055352).

The spelling of 21344011040 in words is "twenty-one billion, three hundred forty-four million, eleven thousand, forty".