20381084 has 12 divisors (see below), whose sum is σ = 36897000. Its totient is φ = 9839088.

The previous prime is 20381083. The next prime is 20381107. The reversal of 20381084 is 48018302.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 87734 + ... + 87965.

It is an arithmetic number, because the mean of its divisors is an integer number (3074750).

Almost surely, 2^20381084 is an apocalyptic number.

It is an amenable number.

20381084 is a deficient number, since it is larger than the sum of its proper divisors (16515916).

20381084 is a wasteful number, since it uses less digits than its factorization.

20381084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175732 (or 175730 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20381084 is about 4514.5413942061. The cubic root of 20381084 is about 273.1549612886.

Adding to 20381084 its reverse (48018302), we get a palindrome (68399386).

The spelling of 20381084 in words is "twenty million, three hundred eighty-one thousand, eighty-four".