20631067 has 4 divisors (see below), whose sum is σ = 20642776. Its totient is φ = 20619360.

The previous prime is 20631043. The next prime is 20631097. The reversal of 20631067 is 76013602.

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 20631067 - 2¹¹ = 20629019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20631097) 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, 2613 + ... + 6934.

It is an arithmetic number, because the mean of its divisors is an integer number (5160694).

Almost surely, 2^20631067 is an apocalyptic number.

20631067 is a deficient number, since it is larger than the sum of its proper divisors (11709).

20631067 is an equidigital number, since it uses as much as digits as its factorization.

20631067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11708.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20631067 is about 4542.1434367488. The cubic root of 20631067 is about 274.2672149421.

Adding to 20631067 its reverse (76013602), we get a palindrome (96644669).

The spelling of 20631067 in words is "twenty million, six hundred thirty-one thousand, sixty-seven".