1838821093 has 16 divisors (see below), whose sum is σ = 1884556800. Its totient is φ = 1793818224.

The previous prime is 1838821087. The next prime is 1838821109. The reversal of 1838821093 is 3901288381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1838821093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838821693) 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, 2691930 + ... + 2692612.

It is an arithmetic number, because the mean of its divisors is an integer number (117784800).

Almost surely, 2^1838821093 is an apocalyptic number.

It is an amenable number.

1838821093 is a deficient number, since it is larger than the sum of its proper divisors (45735707).

1838821093 is a wasteful number, since it uses less digits than its factorization.

1838821093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 1838821093 is about 42881.4772716612. The cubic root of 1838821093 is about 1225.1233734968.

The spelling of 1838821093 in words is "one billion, eight hundred thirty-eight million, eight hundred twenty-one thousand, ninety-three".