21051603030330 has 48 divisors (see below), whose sum is σ = 54743158328040. Its totient is φ = 5612838710784.

The previous prime is 21051603030287. The next prime is 21051603030343. The reversal of 21051603030330 is 3303030615012.

It is a happy number.

21051603030330 is a `hidden beast` number, since 2 + 1 + 0 + 51 + 603 + 0 + 3 + 0 + 3 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10408734230049 + 10642868800281 = 3226257^2 + 3262341^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21051603030294 and 21051603030303.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18659307 + ... + 19755326.

Almost surely, 2^{21051603030330} is an apocalyptic number.

21051603030330 is an abundant number, since it is smaller than the sum of its proper divisors (33691555297710).

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

21051603030330 is a wasteful number, since it uses less digits than its factorization.

21051603030330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38420735 (or 38420732 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

Adding to 21051603030330 its reverse (3303030615012), we get a palindrome (24354633645342).

The spelling of 21051603030330 in words is "twenty-one trillion, fifty-one billion, six hundred three million, thirty thousand, three hundred thirty".