21220033430 has 16 divisors (see below), whose sum is σ = 38198818944. Its totient is φ = 8487400320.

The previous prime is 21220033411. The next prime is 21220033447. The reversal of 21220033430 is 3433002212.

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, 84974 + ... + 222846.

It is an arithmetic number, because the mean of its divisors is an integer number (2387426184).

Almost surely, 2^21220033430 is an apocalyptic number.

21220033430 is a deficient number, since it is larger than the sum of its proper divisors (16978785514).

21220033430 is a wasteful number, since it uses less digits than its factorization.

21220033430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153271.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21220033430 its reverse (3433002212), we get a palindrome (24653035642).

The spelling of 21220033430 in words is "twenty-one billion, two hundred twenty million, thirty-three thousand, four hundred thirty".