1801854381 has 8 divisors (see below), whose sum is σ = 2403459360. Its totient is φ = 1200742832.

The previous prime is 1801854377. The next prime is 1801854421. The reversal of 1801854381 is 1834581081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1801854381 - 2² = 1801854377 is a prime.

It is a super-2 number, since 2×1801854381² = 6493358420657786322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801854281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114750 + ... + 129503.

It is an arithmetic number, because the mean of its divisors is an integer number (300432420).

Almost surely, 2^1801854381 is an apocalyptic number.

It is an amenable number.

1801854381 is a deficient number, since it is larger than the sum of its proper divisors (601604979).

1801854381 is a wasteful number, since it uses less digits than its factorization.

1801854381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246715.

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

The square root of 1801854381 is about 42448.2553351725. The cubic root of 1801854381 is about 1216.8579861102.

The spelling of 1801854381 in words is "one billion, eight hundred one million, eight hundred fifty-four thousand, three hundred eighty-one".