21002350130 has 32 divisors (see below), whose sum is σ = 39370374000. Its totient is φ = 8056797952.

The previous prime is 21002350123. The next prime is 21002350141. The reversal of 21002350130 is 3105320012.

It can be written as a sum of positive squares in 8 ways, for example, as 7434060841 + 13568289289 = 86221^2 + 116483^2 .

It is a super-2 number, since 2×21002350130² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002350099 and 21002350108.

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, 199817 + ... + 286236.

Almost surely, 2^21002350130 is an apocalyptic number.

21002350130 is a deficient number, since it is larger than the sum of its proper divisors (18368023870).

21002350130 is a wasteful number, since it uses less digits than its factorization.

21002350130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486238.

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 21002350130 its reverse (3105320012), we get a palindrome (24107670142).

The spelling of 21002350130 in words is "twenty-one billion, two million, three hundred fifty thousand, one hundred thirty".