21421014344 has 16 divisors (see below), whose sum is σ = 40763871600. Its totient is φ = 10550648592.

The previous prime is 21421014331. The next prime is 21421014359. The reversal of 21421014344 is 44341012412.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19981754 + ... + 19982825.

It is an arithmetic number, because the mean of its divisors is an integer number (2547741975).

Almost surely, 2^21421014344 is an apocalyptic number.

It is an amenable number.

21421014344 is a deficient number, since it is larger than the sum of its proper divisors (19342857256).

21421014344 is a wasteful number, since it uses less digits than its factorization.

21421014344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39964652 (or 39964648 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21421014344 its reverse (44341012412), we get a palindrome (65762026756).

The spelling of 21421014344 in words is "twenty-one billion, four hundred twenty-one million, fourteen thousand, three hundred forty-four".