21404612034354 has 8 divisors (see below), whose sum is σ = 42809224068720. Its totient is φ = 7134870678116.

The previous prime is 21404612034241. The next prime is 21404612034457. The reversal of 21404612034354 is 45343021640412.

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

21404612034354 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1783717669524 + ... + 1783717669535.

It is an arithmetic number, because the mean of its divisors is an integer number (5351153008590).

Almost surely, 2^{21404612034354} is an apocalyptic number.

21404612034354 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21404612034354 is a wasteful number, since it uses less digits than its factorization.

21404612034354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567435339064.

The product of its (nonzero) digits is 276480, while the sum is 39.

Adding to 21404612034354 its reverse (45343021640412), we get a palindrome (66747633674766).

The spelling of 21404612034354 in words is "twenty-one trillion, four hundred four billion, six hundred twelve million, thirty-four thousand, three hundred fifty-four".