21404343214 has 8 divisors (see below), whose sum is σ = 33502450320. Its totient is φ = 10236859776.

The previous prime is 21404343193. The next prime is 21404343217. The reversal of 21404343214 is 41234340412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404343217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232655859 + ... + 232655950.

It is an arithmetic number, because the mean of its divisors is an integer number (4187806290).

Almost surely, 2^21404343214 is an apocalyptic number.

21404343214 is a deficient number, since it is larger than the sum of its proper divisors (12098107106).

21404343214 is a wasteful number, since it uses less digits than its factorization.

21404343214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465311834.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21404343214 its reverse (41234340412), we get a palindrome (62638683626).

The spelling of 21404343214 in words is "twenty-one billion, four hundred four million, three hundred forty-three thousand, two hundred fourteen".