21443243214 has 16 divisors (see below), whose sum is σ = 42901637328. Its totient is φ = 7145222592.

The previous prime is 21443243207. The next prime is 21443243221. The reversal of 21443243214 is 41234234412.

It is an interprime number because it is at equal distance from previous prime (21443243207) and next prime (21443243221).

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, 612847 + ... + 646890.

It is an arithmetic number, because the mean of its divisors is an integer number (2681352333).

Almost surely, 2^21443243214 is an apocalyptic number.

21443243214 is an abundant number, since it is smaller than the sum of its proper divisors (21458394114).

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

21443243214 is a wasteful number, since it uses less digits than its factorization.

21443243214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262579.

The product of its digits is 18432, while the sum is 30.

Adding to 21443243214 its reverse (41234234412), we get a palindrome (62677477626).

The spelling of 21443243214 in words is "twenty-one billion, four hundred forty-three million, two hundred forty-three thousand, two hundred fourteen".