20731067 has 6 divisors (see below), whose sum is σ = 24115788. Its totient is φ = 17769444.

The previous prime is 20731057. The next prime is 20731069. The reversal of 20731067 is 76013702.

It is not a de Polignac number, because 20731067 - 2¹² = 20726971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20731069) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211493 + ... + 211590.

It is an arithmetic number, because the mean of its divisors is an integer number (4019298).

Almost surely, 2^20731067 is an apocalyptic number.

20731067 is a deficient number, since it is larger than the sum of its proper divisors (3384721).

20731067 is an equidigital number, since it uses as much as digits as its factorization.

20731067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423097 (or 423090 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 20731067 is about 4553.1381485740. The cubic root of 20731067 is about 274.7096307004.

Adding to 20731067 its reverse (76013702), we get a palindrome (96744769).

The spelling of 20731067 in words is "twenty million, seven hundred thirty-one thousand, sixty-seven".