20311086 has 8 divisors (see below), whose sum is σ = 40622184. Its totient is φ = 6770360.

The previous prime is 20311079. The next prime is 20311087. The reversal of 20311086 is 68011302.

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

20311086 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311087) 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, 1692585 + ... + 1692596.

It is an arithmetic number, because the mean of its divisors is an integer number (5077773).

Almost surely, 2^20311086 is an apocalyptic number.

20311086 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20311086 is a wasteful number, since it uses less digits than its factorization.

20311086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385186.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20311086 is about 4506.7822223844. The cubic root of 20311086 is about 272.8418894203.

Adding to 20311086 its reverse (68011302), we get a palindrome (88322388).

The spelling of 20311086 in words is "twenty million, three hundred eleven thousand, eighty-six".