21404221014 has 32 divisors (see below), whose sum is σ = 46741645440. Its totient is φ = 6480360000.

The previous prime is 21404220967. The next prime is 21404221019. The reversal of 21404221014 is 41012240412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404221019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69112 + ... + 218139.

It is an arithmetic number, because the mean of its divisors is an integer number (1460676420).

Almost surely, 2^21404221014 is an apocalyptic number.

21404221014 is an abundant number, since it is smaller than the sum of its proper divisors (25337424426).

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

21404221014 is a wasteful number, since it uses less digits than its factorization.

21404221014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288396.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21404221014 its reverse (41012240412), we get a palindrome (62416461426).

The spelling of 21404221014 in words is "twenty-one billion, four hundred four million, two hundred twenty-one thousand, fourteen".