21014330440 has 16 divisors (see below), whose sum is σ = 47282243580. Its totient is φ = 8405732160.

The previous prime is 21014330419. The next prime is 21014330471. The reversal of 21014330440 is 4403341012.

It can be written as a sum of positive squares in 2 ways, for example, as 20965302436 + 49028004 = 144794^2 + 7002^2 .

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, 262679091 + ... + 262679170.

Almost surely, 2^21014330440 is an apocalyptic number.

21014330440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014330440 is an abundant number, since it is smaller than the sum of its proper divisors (26267913140).

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

21014330440 is a wasteful number, since it uses less digits than its factorization.

21014330440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525358272 (or 525358268 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21014330440 its reverse (4403341012), we get a palindrome (25417671452).

The spelling of 21014330440 in words is "twenty-one billion, fourteen million, three hundred thirty thousand, four hundred forty".