21402004204433 has 8 divisors (see below), whose sum is σ = 21662246816448. Its totient is φ = 21143334055824.

The previous prime is 21402004204429. The next prime is 21402004204453. The reversal of 21402004204433 is 33440240020412.

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 21402004204433 - 2² = 21402004204429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21402004204396 and 21402004204405.

It is not an unprimeable number, because it can be changed into a prime (21402004204403) 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, 393088466 + ... + 393142907.

It is an arithmetic number, because the mean of its divisors is an integer number (2707780852056).

Almost surely, 2^{21402004204433} is an apocalyptic number.

It is an amenable number.

21402004204433 is a deficient number, since it is larger than the sum of its proper divisors (260242612015).

21402004204433 is a wasteful number, since it uses less digits than its factorization.

21402004204433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786231703.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21402004204433 its reverse (33440240020412), we get a palindrome (54842244224845).

The spelling of 21402004204433 in words is "twenty-one trillion, four hundred two billion, four million, two hundred four thousand, four hundred thirty-three".