1955933818 has 4 divisors (see below), whose sum is σ = 2933900730. Its totient is φ = 977966908.

The previous prime is 1955933801. The next prime is 1955933867. The reversal of 1955933818 is 8183395591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1897212249 + 58721569 = 43557^2 + 7663^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488983453 + ... + 488983456.

Almost surely, 2^1955933818 is an apocalyptic number.

1955933818 is a deficient number, since it is larger than the sum of its proper divisors (977966912).

1955933818 is an equidigital number, since it uses as much as digits as its factorization.

1955933818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977966911.

The product of its digits is 1166400, while the sum is 52.

The square root of 1955933818 is about 44225.9405552895. The cubic root of 1955933818 is about 1250.5989274895.

The spelling of 1955933818 in words is "one billion, nine hundred fifty-five million, nine hundred thirty-three thousand, eight hundred eighteen".