21420230235 has 8 divisors (see below), whose sum is σ = 34272368400. Its totient is φ = 11424122784.

The previous prime is 21420230189. The next prime is 21420230263. The reversal of 21420230235 is 53203202412.

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

It is not a de Polignac number, because 21420230235 - 2⁶ = 21420230171 is a prime.

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, 714007660 + ... + 714007689.

It is an arithmetic number, because the mean of its divisors is an integer number (4284046050).

Almost surely, 2^21420230235 is an apocalyptic number.

21420230235 is a deficient number, since it is larger than the sum of its proper divisors (12852138165).

21420230235 is a wasteful number, since it uses less digits than its factorization.

21420230235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428015357.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 21420230235 its reverse (53203202412), we get a palindrome (74623432647).

The spelling of 21420230235 in words is "twenty-one billion, four hundred twenty million, two hundred thirty thousand, two hundred thirty-five".