2018819238397 has 8 divisors (see below), whose sum is σ = 2174234189400. Its totient is φ = 1863421596480.

The previous prime is 2018819238389. The next prime is 2018819238473. The reversal of 2018819238397 is 7938329188102.

It can be written as a sum of positive squares in 4 ways, for example, as 935125746361 + 1083693492036 = 967019^2 + 1041006^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2018819238397 - 2³ = 2018819238389 is a prime.

It is a super-2 number, since 2×2018819238397² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018819238377) 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, 4084522 + ... + 4552027.

It is an arithmetic number, because the mean of its divisors is an integer number (271779273675).

Almost surely, 2^{2018819238397} is an apocalyptic number.

It is an amenable number.

2018819238397 is a deficient number, since it is larger than the sum of its proper divisors (155414951003).

2018819238397 is a wasteful number, since it uses less digits than its factorization.

2018819238397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8654543.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 2018819238397 in words is "two trillion, eighteen billion, eight hundred nineteen million, two hundred thirty-eight thousand, three hundred ninety-seven".