1821163082 has 4 divisors (see below), whose sum is σ = 2731744626. Its totient is φ = 910581540.

The previous prime is 1821163073. The next prime is 1821163093. The reversal of 1821163082 is 2803611281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2803611281 = 103 ⋅27219527.

It can be written as a sum of positive squares in only one way, i.e., 1628203201 + 192959881 = 40351^2 + 13891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455290769 + ... + 455290772.

Almost surely, 2^1821163082 is an apocalyptic number.

1821163082 is a deficient number, since it is larger than the sum of its proper divisors (910581544).

1821163082 is an equidigital number, since it uses as much as digits as its factorization.

1821163082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910581543.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1821163082 is about 42675.0873695649. The cubic root of 1821163082 is about 1221.1891750819.

The spelling of 1821163082 in words is "one billion, eight hundred twenty-one million, one hundred sixty-three thousand, eighty-two".