21355400455312 has 60 divisors (see below), whose sum is σ = 52506947059056. Its totient is φ = 8320285888320.

The previous prime is 21355400455297. The next prime is 21355400455373.

21355400455312 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 11 ways as a sum of consecutive naturals, for example, 1238129158 + ... + 1238146405.

Almost surely, 2^{21355400455312} is an apocalyptic number.

21355400455312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21355400455312 is an abundant number, since it is smaller than the sum of its proper divisors (31151546603744).

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

21355400455312 is a wasteful number, since it uses less digits than its factorization.

21355400455312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476275596 (or 2476275583 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 21355400455312 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred million, four hundred fifty-five thousand, three hundred twelve".