21242002143404 has 24 divisors (see below), whose sum is σ = 42485108010240. Its totient is φ = 9103478692176.

The previous prime is 21242002143403. The next prime is 21242002143413. The reversal of 21242002143404 is 40434120024212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21242002143403) 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, 8755514 + ... + 10915265.

It is an arithmetic number, because the mean of its divisors is an integer number (1770212833760).

Almost surely, 2^{21242002143404} is an apocalyptic number.

It is an amenable number.

21242002143404 is an abundant number, since it is smaller than the sum of its proper divisors (21243105866836).

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

21242002143404 is a wasteful number, since it uses less digits than its factorization.

21242002143404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19709357 (or 19709355 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21242002143404 its reverse (40434120024212), we get a palindrome (61676122167616).

The spelling of 21242002143404 in words is "twenty-one trillion, two hundred forty-two billion, two million, one hundred forty-three thousand, four hundred four".