1806064821 has 24 divisors (see below), whose sum is σ = 2847336960. Its totient is φ = 1094040000.

The previous prime is 1806064781. The next prime is 1806064823. The reversal of 1806064821 is 1284606081.

1806064821 is a `hidden beast` number, since 1 + 8 + 0 + 6 + 0 + 648 + 2 + 1 = 666.

It is not a de Polignac number, because 1806064821 - 2²³ = 1797676213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806064823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294060 + ... + 300138.

It is an arithmetic number, because the mean of its divisors is an integer number (118639040).

Almost surely, 2^1806064821 is an apocalyptic number.

1806064821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1806064821 is a deficient number, since it is larger than the sum of its proper divisors (1041272139).

1806064821 is a wasteful number, since it uses less digits than its factorization.

1806064821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097 (or 9094 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1806064821 is about 42497.8213676890. The cubic root of 1806064821 is about 1217.8050700368.

The spelling of 1806064821 in words is "one billion, eight hundred six million, sixty-four thousand, eight hundred twenty-one".