21402113443 has 8 divisors (see below), whose sum is σ = 21787194560. Its totient is φ = 21018963240.

The previous prime is 21402113441. The next prime is 21402113483. The reversal of 21402113443 is 34431120412.

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

It is a cyclic number.

It is not a de Polignac number, because 21402113443 - 2¹ = 21402113441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21402113441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460353 + ... + 504706.

It is an arithmetic number, because the mean of its divisors is an integer number (2723399320).

Almost surely, 2^21402113443 is an apocalyptic number.

21402113443 is a deficient number, since it is larger than the sum of its proper divisors (385081117).

21402113443 is an equidigital number, since it uses as much as digits as its factorization.

21402113443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965457.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21402113443 its reverse (34431120412), we get a palindrome (55833233855).

The spelling of 21402113443 in words is "twenty-one billion, four hundred two million, one hundred thirteen thousand, four hundred forty-three".