918304919021 has 64 divisors (see below), whose sum is σ = 1188388454400. Its totient is φ = 691195355136.

The previous prime is 918304919003. The next prime is 918304919023. The reversal of 918304919021 is 120919403819.

It is a cyclic number.

It is not a de Polignac number, because 918304919021 - 2¹⁰ = 918304917997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918304919023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17920925 + ... + 17972093.

It is an arithmetic number, because the mean of its divisors is an integer number (18568569600).

Almost surely, 2^918304919021 is an apocalyptic number.

It is an amenable number.

918304919021 is a deficient number, since it is larger than the sum of its proper divisors (270083535379).

918304919021 is a wasteful number, since it uses less digits than its factorization.

918304919021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51378.

The product of its (nonzero) digits is 139968, while the sum is 47.

The spelling of 918304919021 in words is "nine hundred eighteen billion, three hundred four million, nine hundred nineteen thousand, twenty-one".