20211368 has 32 divisors (see below), whose sum is σ = 40334760. Its totient is φ = 9461760.

The previous prime is 20211263. The next prime is 20211377. The reversal of 20211368 is 86311202.

It can be written as a sum of positive squares in 4 ways, for example, as 12802084 + 7409284 = 3578^2 + 2722^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47798 + ... + 48218.

Almost surely, 2^20211368 is an apocalyptic number.

It is an amenable number.

20211368 is a deficient number, since it is larger than the sum of its proper divisors (20123392).

20211368 is a wasteful number, since it uses less digits than its factorization.

20211368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20211368 is about 4495.7055063694. The cubic root of 20211368 is about 272.3946477127.

The spelling of 20211368 in words is "twenty million, two hundred eleven thousand, three hundred sixty-eight".