20731382 has 16 divisors (see below), whose sum is σ = 35607552. Its totient is φ = 8867880.

The previous prime is 20731351. The next prime is 20731391. The reversal of 20731382 is 28313702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8603 + ... + 10745.

It is an arithmetic number, because the mean of its divisors is an integer number (2225472).

Almost surely, 2^20731382 is an apocalyptic number.

20731382 is a deficient number, since it is larger than the sum of its proper divisors (14876170).

20731382 is a wasteful number, since it uses less digits than its factorization.

20731382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 20731382 is about 4553.1727399694. The cubic root of 20731382 is about 274.7110220598.

The spelling of 20731382 in words is "twenty million, seven hundred thirty-one thousand, three hundred eighty-two".