20311514 has 8 divisors (see below), whose sum is σ = 30686880. Its totient is φ = 10082556.

The previous prime is 20311471. The next prime is 20311547. The reversal of 20311514 is 41511302.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20311492 and 20311501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36254 + ... + 36809.

It is an arithmetic number, because the mean of its divisors is an integer number (3835860).

Almost surely, 2^20311514 is an apocalyptic number.

20311514 is a deficient number, since it is larger than the sum of its proper divisors (10375366).

20311514 is a wasteful number, since it uses less digits than its factorization.

20311514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73204.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20311514 is about 4506.8297061238. The cubic root of 20311514 is about 272.8438058697.

Adding to 20311514 its reverse (41511302), we get a palindrome (61822816).

The spelling of 20311514 in words is "twenty million, three hundred eleven thousand, five hundred fourteen".