21404534255 has 8 divisors (see below), whose sum is σ = 27661244352. Its totient is φ = 15806425248.

The previous prime is 21404534237. The next prime is 21404534273. The reversal of 21404534255 is 55243540412.

It is an interprime number because it is at equal distance from previous prime (21404534237) and next prime (21404534273).

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 21404534255 - 2¹⁰ = 21404533231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164650199 + ... + 164650328.

It is an arithmetic number, because the mean of its divisors is an integer number (3457655544).

Almost surely, 2^21404534255 is an apocalyptic number.

21404534255 is a deficient number, since it is larger than the sum of its proper divisors (6256710097).

21404534255 is a wasteful number, since it uses less digits than its factorization.

21404534255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329300545.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 21404534255 in words is "twenty-one billion, four hundred four million, five hundred thirty-four thousand, two hundred fifty-five".