20181842 has 8 divisors (see below), whose sum is σ = 30294000. Its totient is φ = 10083844.

The previous prime is 20181823. The next prime is 20181851. The reversal of 20181842 is 24818102.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (3786750).

Almost surely, 2^20181842 is an apocalyptic number.

20181842 is a deficient number, since it is larger than the sum of its proper divisors (10112158).

20181842 is a wasteful number, since it uses less digits than its factorization.

20181842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 20181842 is about 4492.4205056962. The cubic root of 20181842 is about 272.2619394932.

Adding to 20181842 its reverse (24818102), we get a palindrome (44999944).

The spelling of 20181842 in words is "twenty million, one hundred eighty-one thousand, eight hundred forty-two".