1850608821 has 16 divisors (see below), whose sum is σ = 2489974784. Its totient is φ = 1222515504.

The previous prime is 1850608817. The next prime is 1850608843. The reversal of 1850608821 is 1288060581.

1850608821 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1850608821 - 2² = 1850608817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1850608821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1850608801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365916 + ... + 370938.

It is an arithmetic number, because the mean of its divisors is an integer number (155623424).

Almost surely, 2^1850608821 is an apocalyptic number.

It is an amenable number.

1850608821 is a deficient number, since it is larger than the sum of its proper divisors (639365963).

1850608821 is a wasteful number, since it uses less digits than its factorization.

1850608821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120.

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 1850608821 is about 43018.7031533960. The cubic root of 1850608821 is about 1227.7356761584.

The spelling of 1850608821 in words is "one billion, eight hundred fifty million, six hundred eight thousand, eight hundred twenty-one".