21150424530 has 24 divisors (see below), whose sum is σ = 54991104012. Its totient is φ = 5640113184.

The previous prime is 21150424501. The next prime is 21150424549. The reversal of 21150424530 is 3542405112.

21150424530 is a `hidden beast` number, since 21 + 150 + 42 + 453 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20119436649 + 1030987881 = 141843^2 + 32109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21150424494 and 21150424503.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117502269 + ... + 117502448.

Almost surely, 2^21150424530 is an apocalyptic number.

21150424530 is an abundant number, since it is smaller than the sum of its proper divisors (33840679482).

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

21150424530 is a wasteful number, since it uses less digits than its factorization.

21150424530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235004730 (or 235004727 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21150424530 its reverse (3542405112), we get a palindrome (24692829642).

The spelling of 21150424530 in words is "twenty-one billion, one hundred fifty million, four hundred twenty-four thousand, five hundred thirty".