21003430433 has 8 divisors (see below), whose sum is σ = 22110520320. Its totient is φ = 19896505200.

The previous prime is 21003430417. The next prime is 21003430439. The reversal of 21003430433 is 33403430012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21003430433 - 2⁴ = 21003430417 is a prime.

It is a super-2 number, since 2×21003430433² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21003430399 and 21003430408.

It is not an unprimeable number, because it can be changed into a prime (21003430439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288416 + ... + 353822.

It is an arithmetic number, because the mean of its divisors is an integer number (2763815040).

Almost surely, 2^21003430433 is an apocalyptic number.

It is an amenable number.

21003430433 is a deficient number, since it is larger than the sum of its proper divisors (1107089887).

21003430433 is a wasteful number, since it uses less digits than its factorization.

21003430433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82327.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21003430433 its reverse (33403430012), we get a palindrome (54406860445).

The spelling of 21003430433 in words is "twenty-one billion, three million, four hundred thirty thousand, four hundred thirty-three".