20082731 has 4 divisors (see below), whose sum is σ = 20091864. Its totient is φ = 20073600.

The previous prime is 20082709. The next prime is 20082737. The reversal of 20082731 is 13728002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20082731 - 2¹⁸ = 19820587 is a prime.

It is a super-2 number, since 2×20082731² = 806632168836722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20082697 and 20082706.

It is not an unprimeable number, because it can be changed into a prime (20082737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 971 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (5022966).

Almost surely, 2^20082731 is an apocalyptic number.

20082731 is a deficient number, since it is larger than the sum of its proper divisors (9133).

20082731 is an equidigital number, since it uses as much as digits as its factorization.

20082731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20082731 is about 4481.3760163593. The cubic root of 20082731 is about 271.8155242428.

The spelling of 20082731 in words is "twenty million, eighty-two thousand, seven hundred thirty-one".