21414444040 has 64 divisors (see below), whose sum is σ = 52579134720. Its totient is φ = 7784640000.

The previous prime is 21414444017. The next prime is 21414444041. The reversal of 21414444040 is 4044441412.

It is not an unprimeable number, because it can be changed into a prime (21414444041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2014740 + ... + 2025340.

It is an arithmetic number, because the mean of its divisors is an integer number (821548980).

Almost surely, 2^21414444040 is an apocalyptic number.

21414444040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21414444040 is an abundant number, since it is smaller than the sum of its proper divisors (31164690680).

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

21414444040 is a wasteful number, since it uses less digits than its factorization.

21414444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15214 (or 15210 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 21414444040 its reverse (4044441412), we get a palindrome (25458885452).

The spelling of 21414444040 in words is "twenty-one billion, four hundred fourteen million, four hundred forty-four thousand, forty".