20142311 has 4 divisors (see below), whose sum is σ = 23019792. Its totient is φ = 17264832.

The previous prime is 20142307. The next prime is 20142313. The reversal of 20142311 is 11324102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11324102 = 2 ⋅5662051.

It is a cyclic number.

It is not a de Polignac number, because 20142311 - 2² = 20142307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142313) 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, 1438730 + ... + 1438743.

It is an arithmetic number, because the mean of its divisors is an integer number (5754948).

Almost surely, 2^20142311 is an apocalyptic number.

20142311 is a deficient number, since it is larger than the sum of its proper divisors (2877481).

20142311 is an equidigital number, since it uses as much as digits as its factorization.

20142311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877480.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20142311 is about 4488.0186051308. The cubic root of 20142311 is about 272.0840597675.

Adding to 20142311 its reverse (11324102), we get a palindrome (31466413).

The spelling of 20142311 in words is "twenty million, one hundred forty-two thousand, three hundred eleven".