21033203130 has 24 divisors (see below), whose sum is σ = 54686328372. Its totient is φ = 5608854144.

The previous prime is 21033203123. The next prime is 21033203153. The reversal of 21033203130 is 3130233012.

21033203130 is a `hidden beast` number, since 21 + 0 + 332 + 0 + 313 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20110926969 + 922276161 = 141813^2 + 30369^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 116851039 + ... + 116851218.

Almost surely, 2^21033203130 is an apocalyptic number.

21033203130 is an abundant number, since it is smaller than the sum of its proper divisors (33653125242).

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

21033203130 is a wasteful number, since it uses less digits than its factorization.

21033203130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233702270 (or 233702267 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21033203130 its reverse (3130233012), we get a palindrome (24163436142).

The spelling of 21033203130 in words is "twenty-one billion, thirty-three million, two hundred three thousand, one hundred thirty".