21443011402 has 8 divisors (see below), whose sum is σ = 32221649376. Its totient is φ = 10702461612.

The previous prime is 21443011399. The next prime is 21443011409. The reversal of 21443011402 is 20411034412.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21443011409) 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, 9520638 + ... + 9522889.

It is an arithmetic number, because the mean of its divisors is an integer number (4027706172).

Almost surely, 2^21443011402 is an apocalyptic number.

21443011402 is a deficient number, since it is larger than the sum of its proper divisors (10778637974).

21443011402 is a wasteful number, since it uses less digits than its factorization.

21443011402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19044092.

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

Adding to 21443011402 its reverse (20411034412), we get a palindrome (41854045814).

The spelling of 21443011402 in words is "twenty-one billion, four hundred forty-three million, eleven thousand, four hundred two".