20381801 has 16 divisors (see below), whose sum is σ = 22809600. Its totient is φ = 18057600.

The previous prime is 20381791. The next prime is 20381807. The reversal of 20381801 is 10818302.

It is not a de Polignac number, because 20381801 - 2¹⁰ = 20380777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20381807) 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, 106616 + ... + 106806.

It is an arithmetic number, because the mean of its divisors is an integer number (1425600).

Almost surely, 2^20381801 is an apocalyptic number.

It is an amenable number.

20381801 is a deficient number, since it is larger than the sum of its proper divisors (2427799).

20381801 is a wasteful number, since it uses less digits than its factorization.

20381801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20381801 is about 4514.6208035670. The cubic root of 20381801 is about 273.1581644190.

The spelling of 20381801 in words is "twenty million, three hundred eighty-one thousand, eight hundred one".