20381082 has 16 divisors (see below), whose sum is σ = 42534720. Its totient is φ = 6498272.

The previous prime is 20381077. The next prime is 20381083. The reversal of 20381082 is 28018302.

It is not an unprimeable number, because it can be changed into a prime (20381083) 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, 73707 + ... + 73982.

It is an arithmetic number, because the mean of its divisors is an integer number (2658420).

Almost surely, 2^20381082 is an apocalyptic number.

20381082 is an abundant number, since it is smaller than the sum of its proper divisors (22153638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20381082 is a wasteful number, since it uses less digits than its factorization.

20381082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147717.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20381082 is about 4514.5411726996. The cubic root of 20381082 is about 273.1549523537.

Adding to 20381082 its reverse (28018302), we get a palindrome (48399384).

The spelling of 20381082 in words is "twenty million, three hundred eighty-one thousand, eighty-two".