1801881082 has 4 divisors (see below), whose sum is σ = 2702821626. Its totient is φ = 900940540.

The previous prime is 1801881077. The next prime is 1801881101. The reversal of 1801881082 is 2801881081.

It is a happy number.

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., 1275132681 + 526748401 = 35709^2 + 22951^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450470269 + ... + 450470272.

Almost surely, 2^1801881082 is an apocalyptic number.

1801881082 is a deficient number, since it is larger than the sum of its proper divisors (900940544).

1801881082 is an equidigital number, since it uses as much as digits as its factorization.

1801881082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900940543.

The product of its (nonzero) digits is 8192, while the sum is 37.

The square root of 1801881082 is about 42448.5698463446. The cubic root of 1801881082 is about 1216.8639968002.

Subtracting 1801881082 from its reverse (2801881081), we obtain a palindrome (999999999).

The spelling of 1801881082 in words is "one billion, eight hundred one million, eight hundred eighty-one thousand, eighty-two".