20084831 has 4 divisors (see below), whose sum is σ = 21629832. Its totient is φ = 18539832.

The previous prime is 20084783. The next prime is 20084851. The reversal of 20084831 is 13848002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20084831 - 2²² = 15890527 is a prime.

It is a super-2 number, since 2×20084831² = 806800872597122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20084831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20084851) 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, 772481 + ... + 772506.

It is an arithmetic number, because the mean of its divisors is an integer number (5407458).

Almost surely, 2^20084831 is an apocalyptic number.

20084831 is a deficient number, since it is larger than the sum of its proper divisors (1545001).

20084831 is a wasteful number, since it uses less digits than its factorization.

20084831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545000.

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

The square root of 20084831 is about 4481.6103132691. The cubic root of 20084831 is about 271.8249982648.

The spelling of 20084831 in words is "twenty million, eighty-four thousand, eight hundred thirty-one".