20631368 has 32 divisors (see below), whose sum is σ = 41679360. Its totient is φ = 9546240.

The previous prime is 20631367. The next prime is 20631389. The reversal of 20631368 is 86313602.

It is a self number, because there is not a number n which added to its sum of digits gives 20631368.

It is not an unprimeable number, because it can be changed into a prime (20631367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3896 + ... + 7512.

It is an arithmetic number, because the mean of its divisors is an integer number (1302480).

Almost surely, 2^20631368 is an apocalyptic number.

It is an amenable number.

20631368 is an abundant number, since it is smaller than the sum of its proper divisors (21047992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20631368 is a wasteful number, since it uses less digits than its factorization.

20631368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20631368 is about 4542.1765707643. The cubic root of 20631368 is about 274.2685487563.

The spelling of 20631368 in words is "twenty million, six hundred thirty-one thousand, three hundred sixty-eight".