1918832133 has 4 divisors (see below), whose sum is σ = 2558442848. Its totient is φ = 1279221420.

The previous prime is 1918832131. The next prime is 1918832159. The reversal of 1918832133 is 3312388191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1918832133 - 2¹ = 1918832131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1918832091 and 1918832100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918832131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319805353 + ... + 319805358.

It is an arithmetic number, because the mean of its divisors is an integer number (639610712).

Almost surely, 2^1918832133 is an apocalyptic number.

It is an amenable number.

1918832133 is a deficient number, since it is larger than the sum of its proper divisors (639610715).

1918832133 is an equidigital number, since it uses as much as digits as its factorization.

1918832133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639610714.

The product of its digits is 31104, while the sum is 39.

The square root of 1918832133 is about 43804.4761753865. The cubic root of 1918832133 is about 1242.6409488873.

The spelling of 1918832133 in words is "one billion, nine hundred eighteen million, eight hundred thirty-two thousand, one hundred thirty-three".