21428338335 has 16 divisors (see below), whose sum is σ = 34847397600. Its totient is φ = 11241095040.

The previous prime is 21428338319. The next prime is 21428338417. The reversal of 21428338335 is 53383382412.

It is not a de Polignac number, because 21428338335 - 2⁴ = 21428338319 is a prime.

It is a congruent number.

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, 11708560 + ... + 11710389.

It is an arithmetic number, because the mean of its divisors is an integer number (2177962350).

Almost surely, 2^21428338335 is an apocalyptic number.

21428338335 is a deficient number, since it is larger than the sum of its proper divisors (13419059265).

21428338335 is a wasteful number, since it uses less digits than its factorization.

21428338335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23419018.

The product of its digits is 414720, while the sum is 42.

The spelling of 21428338335 in words is "twenty-one billion, four hundred twenty-eight million, three hundred thirty-eight thousand, three hundred thirty-five".