1820338195 has 8 divisors (see below), whose sum is σ = 2352437136. Its totient is φ = 1344249696.

The previous prime is 1820338193. The next prime is 1820338217. The reversal of 1820338195 is 5918330281.

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 1820338195 - 2¹ = 1820338193 is a prime.

It is a super-2 number, since 2×1820338195² = 6627262288351716050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820338193) 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, 14002537 + ... + 14002666.

It is an arithmetic number, because the mean of its divisors is an integer number (294054642).

Almost surely, 2^1820338195 is an apocalyptic number.

1820338195 is a deficient number, since it is larger than the sum of its proper divisors (532098941).

1820338195 is a wasteful number, since it uses less digits than its factorization.

1820338195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28005221.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1820338195 is about 42665.4215378215. The cubic root of 1820338195 is about 1221.0047699960.

The spelling of 1820338195 in words is "one billion, eight hundred twenty million, three hundred thirty-eight thousand, one hundred ninety-five".