21554433445512 has 64 divisors (see below), whose sum is σ = 62242749000000. Its totient is φ = 6147431997440.

The previous prime is 21554433445487. The next prime is 21554433445661.

It is a happy number.

21554433445512 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2401336137 + ... + 2401345112.

It is an arithmetic number, because the mean of its divisors is an integer number (972542953125).

Almost surely, 2^{21554433445512} is an apocalyptic number.

21554433445512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21554433445512 is an abundant number, since it is smaller than the sum of its proper divisors (40688315554488).

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

21554433445512 is a wasteful number, since it uses less digits than its factorization.

21554433445512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4802681286 (or 4802681282 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 48.

The spelling of 21554433445512 in words is "twenty-one trillion, five hundred fifty-four billion, four hundred thirty-three million, four hundred forty-five thousand, five hundred twelve".