1821836841 has 32 divisors (see below), whose sum is σ = 2820096000. Its totient is φ = 1033908480.

The previous prime is 1821836801. The next prime is 1821836867. The reversal of 1821836841 is 1486381281.

It is not a de Polignac number, because 1821836841 - 2⁶ = 1821836777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1821836793 and 1821836802.

It is not an unprimeable number, because it can be changed into a prime (1821836801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103480 + ... + 119798.

It is an arithmetic number, because the mean of its divisors is an integer number (88128000).

Almost surely, 2^1821836841 is an apocalyptic number.

1821836841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1821836841 is a deficient number, since it is larger than the sum of its proper divisors (998259159).

1821836841 is a wasteful number, since it uses less digits than its factorization.

1821836841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16549.

The product of its digits is 73728, while the sum is 42.

The square root of 1821836841 is about 42682.9806948859. The cubic root of 1821836841 is about 1221.3397538997.

The spelling of 1821836841 in words is "one billion, eight hundred twenty-one million, eight hundred thirty-six thousand, eight hundred forty-one".