20311486 has 8 divisors (see below), whose sum is σ = 32810904. Its totient is φ = 9374520.

The previous prime is 20311471. The next prime is 20311547. The reversal of 20311486 is 68411302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20311486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390580 + ... + 390631.

It is an arithmetic number, because the mean of its divisors is an integer number (4101363).

Almost surely, 2^20311486 is an apocalyptic number.

20311486 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20311486 is a deficient number, since it is larger than the sum of its proper divisors (12499418).

20311486 is a wasteful number, since it uses less digits than its factorization.

20311486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781226.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20311486 is about 4506.8265997262. The cubic root of 20311486 is about 272.8436804953.

Adding to 20311486 its reverse (68411302), we get a palindrome (88722788).

The spelling of 20311486 in words is "twenty million, three hundred eleven thousand, four hundred eighty-six".