21404401433233 has 32 divisors (see below), whose sum is σ = 29106280336896. Its totient is φ = 15246146792448.

The previous prime is 21404401433227. The next prime is 21404401433251. The reversal of 21404401433233 is 33233410440412.

It is not a de Polignac number, because 21404401433233 - 2³⁷ = 21266962479761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21404401436233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300748566 + ... + 300819727.

It is an arithmetic number, because the mean of its divisors is an integer number (909571260528).

Almost surely, 2^{21404401433233} is an apocalyptic number.

21404401433233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21404401433233 is a deficient number, since it is larger than the sum of its proper divisors (7701878903663).

21404401433233 is a wasteful number, since it uses less digits than its factorization.

21404401433233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601568353.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 21404401433233 its reverse (33233410440412), we get a palindrome (54637811873645).

The spelling of 21404401433233 in words is "twenty-one trillion, four hundred four billion, four hundred one million, four hundred thirty-three thousand, two hundred thirty-three".