1970820185 has 8 divisors (see below), whose sum is σ = 2422667016. Its totient is φ = 1538200960.

The previous prime is 1970820179. The next prime is 1970820221. The reversal of 1970820185 is 5810280791.

It can be written as a sum of positive squares in 4 ways, for example, as 142659136 + 1828161049 = 11944^2 + 42757^2 .

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

It is not a de Polignac number, because 1970820185 - 2²⁴ = 1954042969 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4806674 + ... + 4807083.

It is an arithmetic number, because the mean of its divisors is an integer number (302833377).

Almost surely, 2^1970820185 is an apocalyptic number.

It is an amenable number.

1970820185 is a deficient number, since it is larger than the sum of its proper divisors (451846831).

1970820185 is an equidigital number, since it uses as much as digits as its factorization.

1970820185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9613803.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 1970820185 is about 44393.9205860442. The cubic root of 1970820185 is about 1253.7636295013.

It can be divided in two parts, 19708 and 20185, that added together give a palindrome (39893).

The spelling of 1970820185 in words is "one billion, nine hundred seventy million, eight hundred twenty thousand, one hundred eighty-five".