8235718421 has 16 divisors (see below), whose sum is σ = 9712241280. Its totient is φ = 6836709120.

The previous prime is 8235718367. The next prime is 8235718427. The reversal of 8235718421 is 1248175328.

It is a cyclic number.

It is not a de Polignac number, because 8235718421 - 2¹⁰ = 8235717397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8235718427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65411 + ... + 144048.

It is an arithmetic number, because the mean of its divisors is an integer number (607015080).

Almost surely, 2^8235718421 is an apocalyptic number.

It is an amenable number.

8235718421 is a deficient number, since it is larger than the sum of its proper divisors (1476522859).

8235718421 is a wasteful number, since it uses less digits than its factorization.

8235718421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209644.

The product of its digits is 107520, while the sum is 41.

The square root of 8235718421 is about 90750.8590648044. The cubic root of 8235718421 is about 2019.4533714357.

The spelling of 8235718421 in words is "eight billion, two hundred thirty-five million, seven hundred eighteen thousand, four hundred twenty-one".