821407230418 has 16 divisors (see below), whose sum is σ = 1235183007744. Its totient is φ = 409679791920.

The previous prime is 821407230353. The next prime is 821407230419. The reversal of 821407230418 is 814032704128.

It is not an unprimeable number, because it can be changed into a prime (821407230419) 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, 7716271 + ... + 7821997.

It is an arithmetic number, because the mean of its divisors is an integer number (77198937984).

Almost surely, 2^821407230418 is an apocalyptic number.

821407230418 is a deficient number, since it is larger than the sum of its proper divisors (413775777326).

821407230418 is a wasteful number, since it uses less digits than its factorization.

821407230418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115377.

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 821407230418 in words is "eight hundred twenty-one billion, four hundred seven million, two hundred thirty thousand, four hundred eighteen".