21630405533405 has 8 divisors (see below), whose sum is σ = 27322617516000. Its totient is φ = 16393570509456.

The previous prime is 21630405533393. The next prime is 21630405533437. The reversal of 21630405533405 is 50433550403612.

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 21630405533405 - 2¹² = 21630405529309 is a prime.

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, 113844239555 + ... + 113844239744.

It is an arithmetic number, because the mean of its divisors is an integer number (3415327189500).

Almost surely, 2^{21630405533405} is an apocalyptic number.

It is an amenable number.

21630405533405 is a deficient number, since it is larger than the sum of its proper divisors (5692211982595).

21630405533405 is a wasteful number, since it uses less digits than its factorization.

21630405533405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227688479323.

The product of its (nonzero) digits is 648000, while the sum is 41.

The spelling of 21630405533405 in words is "twenty-one trillion, six hundred thirty billion, four hundred five million, five hundred thirty-three thousand, four hundred five".