21404312014 has 16 divisors (see below), whose sum is σ = 32867797248. Its totient is φ = 10448601912.

The previous prime is 21404311997. The next prime is 21404312081. The reversal of 21404312014 is 41021340412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142269 + ... + 251095.

It is an arithmetic number, because the mean of its divisors is an integer number (2054237328).

Almost surely, 2^21404312014 is an apocalyptic number.

21404312014 is a deficient number, since it is larger than the sum of its proper divisors (11463485234).

21404312014 is a wasteful number, since it uses less digits than its factorization.

21404312014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111159.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21404312014 its reverse (41021340412), we get a palindrome (62425652426).

The spelling of 21404312014 in words is "twenty-one billion, four hundred four million, three hundred twelve thousand, fourteen".