18819801 has 48 divisors (see below), whose sum is σ = 36516480. Its totient is φ = 9020160.

The previous prime is 18819797. The next prime is 18819809. The reversal of 18819801 is 10891881.

It is not a de Polignac number, because 18819801 - 2² = 18819797 is a prime.

18819801 is a modest number, since divided by 9801 gives 1881 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18819809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7965 + ... + 10053.

It is an arithmetic number, because the mean of its divisors is an integer number (760760).

Almost surely, 2^18819801 is an apocalyptic number.

18819801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18819801 is a deficient number, since it is larger than the sum of its proper divisors (17696679).

18819801 is a wasteful number, since it uses less digits than its factorization.

18819801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 18819801 is about 4338.1794568690. The cubic root of 18819801 is about 265.9938990818.

The spelling of 18819801 in words is "eighteen million, eight hundred nineteen thousand, eight hundred one".