21003200054 has 8 divisors (see below), whose sum is σ = 31505464920. Its totient is φ = 10501378416.

The previous prime is 21003200021. The next prime is 21003200063. The reversal of 21003200054 is 45000230012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21003200054² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 60842 + ... + 213794.

It is an arithmetic number, because the mean of its divisors is an integer number (3938183115).

Almost surely, 2^21003200054 is an apocalyptic number.

21003200054 is a deficient number, since it is larger than the sum of its proper divisors (10502264866).

21003200054 is a wasteful number, since it uses less digits than its factorization.

21003200054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221614.

The product of its (nonzero) digits is 240, while the sum is 17.

Adding to 21003200054 its reverse (45000230012), we get a palindrome (66003430066).

The spelling of 21003200054 in words is "twenty-one billion, three million, two hundred thousand, fifty-four".