20115343 has 4 divisors (see below), whose sum is σ = 20415640. Its totient is φ = 19815048.

The previous prime is 20115331. The next prime is 20115353. The reversal of 20115343 is 34351102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20115343 - 2¹³ = 20107151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20115343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115323) 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, 150048 + ... + 150181.

It is an arithmetic number, because the mean of its divisors is an integer number (5103910).

Almost surely, 2^20115343 is an apocalyptic number.

20115343 is a deficient number, since it is larger than the sum of its proper divisors (300297).

20115343 is an equidigital number, since it uses as much as digits as its factorization.

20115343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300296.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20115343 is about 4485.0131549417. The cubic root of 20115343 is about 271.9625768511.

Adding to 20115343 its reverse (34351102), we get a palindrome (54466445).

The spelling of 20115343 in words is "twenty million, one hundred fifteen thousand, three hundred forty-three".