21144203030 has 16 divisors (see below), whose sum is σ = 38350098864. Its totient is φ = 8393118240.

The previous prime is 21144203027. The next prime is 21144203081. The reversal of 21144203030 is 3030244112.

It is a super-2 number, since 2×21144203030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21144202993 and 21144203011.

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 7 ways as a sum of consecutive naturals, for example, 8068997 + ... + 8071616.

It is an arithmetic number, because the mean of its divisors is an integer number (2396881179).

Almost surely, 2^21144203030 is an apocalyptic number.

21144203030 is a deficient number, since it is larger than the sum of its proper divisors (17205895834).

21144203030 is a wasteful number, since it uses less digits than its factorization.

21144203030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16140751.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21144203030 its reverse (3030244112), we get a palindrome (24174447142).

The spelling of 21144203030 in words is "twenty-one billion, one hundred forty-four million, two hundred three thousand, thirty".