21033242130 has 32 divisors (see below), whose sum is σ = 51553822464. Its totient is φ = 5489526656.

The previous prime is 21033242089. The next prime is 21033242141. The reversal of 21033242130 is 3124233012.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21033242097 and 21033242106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7457187 + ... + 7460006.

It is an arithmetic number, because the mean of its divisors is an integer number (1611056952).

Almost surely, 2^21033242130 is an apocalyptic number.

21033242130 is an abundant number, since it is smaller than the sum of its proper divisors (30520580334).

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

21033242130 is a wasteful number, since it uses less digits than its factorization.

21033242130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14917250.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21033242130 its reverse (3124233012), we get a palindrome (24157475142).

The spelling of 21033242130 in words is "twenty-one billion, thirty-three million, two hundred forty-two thousand, one hundred thirty".