21343014456 has 16 divisors (see below), whose sum is σ = 53357536200. Its totient is φ = 7114338144.

The previous prime is 21343014403. The next prime is 21343014461. The reversal of 21343014456 is 65441034312.

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 3 ways as a sum of consecutive naturals, for example, 444646111 + ... + 444646158.

Almost surely, 2^21343014456 is an apocalyptic number.

It is an amenable number.

21343014456 is an abundant number, since it is smaller than the sum of its proper divisors (32014521744).

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

21343014456 is a wasteful number, since it uses less digits than its factorization.

21343014456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889292278 (or 889292274 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21343014456 its reverse (65441034312), we get a palindrome (86784048768).

The spelling of 21343014456 in words is "twenty-one billion, three hundred forty-three million, fourteen thousand, four hundred fifty-six".