21630043625554 has 128 divisors (see below), whose sum is σ = 40888703116800. Its totient is φ = 8527291718400.

The previous prime is 21630043625543. The next prime is 21630043625569. The reversal of 21630043625554 is 45552634003612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7920190369 + ... + 7920193099.

It is an arithmetic number, because the mean of its divisors is an integer number (319442993100).

Almost surely, 2^{21630043625554} is an apocalyptic number.

21630043625554 is a deficient number, since it is larger than the sum of its proper divisors (19258659491246).

21630043625554 is a wasteful number, since it uses less digits than its factorization.

21630043625554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5521 (or 5507 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 21630043625554 in words is "twenty-one trillion, six hundred thirty billion, forty-three million, six hundred twenty-five thousand, five hundred fifty-four".