21003430012 has 24 divisors (see below), whose sum is σ = 36963422496. Its totient is φ = 10442513088.

The previous prime is 21003429971. The next prime is 21003430039.

It is a happy number.

21003430012 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21003430012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611273 + ... + 1624255.

It is an arithmetic number, because the mean of its divisors is an integer number (1540142604).

Almost surely, 2^21003430012 is an apocalyptic number.

It is an amenable number.

21003430012 is a deficient number, since it is larger than the sum of its proper divisors (15959992484).

21003430012 is a wasteful number, since it uses less digits than its factorization.

21003430012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15237 (or 15235 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The spelling of 21003430012 in words is "twenty-one billion, three million, four hundred thirty thousand, twelve".