20031084 has 72 divisors (see below), whose sum is σ = 53939760. Its totient is φ = 6428160.

The previous prime is 20031059. The next prime is 20031101. The reversal of 20031084 is 48013002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103692 + ... + 103884.

Almost surely, 2^20031084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26969880).

20031084 is an abundant number, since it is smaller than the sum of its proper divisors (33908676).

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

20031084 is a wasteful number, since it uses less digits than its factorization.

20031084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20031084 is about 4475.6099025719. The cubic root of 20031084 is about 271.5823137979.

Adding to 20031084 its reverse (48013002), we get a palindrome (68044086).

The spelling of 20031084 in words is "twenty million, thirty-one thousand, eighty-four".