21242400000003 has 72 divisors (see below), whose sum is σ = 39477510818928. Its totient is φ = 10901950351488.

The previous prime is 21242399999999. The next prime is 21242400000011. The reversal of 21242400000003 is 30000000424212.

21242400000003 is a `hidden beast` number, since 21 + 242 + 400 + 0 + 0 + 0 + 0 + 0 + 3 = 666.

It is not a de Polignac number, because 21242400000003 - 2² = 21242399999999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21242400000203) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 49859301 + ... + 50283542.

It is an arithmetic number, because the mean of its divisors is an integer number (548298761374).

Almost surely, 2^{21242400000003} is an apocalyptic number.

21242400000003 is a deficient number, since it is larger than the sum of its proper divisors (18235110818925).

21242400000003 is a wasteful number, since it uses less digits than its factorization.

21242400000003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100142913 (or 100142903 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21242400000003 its reverse (30000000424212), we get a palindrome (51242400424215).

The spelling of 21242400000003 in words is "twenty-one trillion, two hundred forty-two billion, four hundred million, three", and thus it is an aban number.