20343539 has 4 divisors (see below), whose sum is σ = 20352624. Its totient is φ = 20334456.

The previous prime is 20343517. The next prime is 20343553. The reversal of 20343539 is 93534302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20343539 - 2¹⁶ = 20278003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20343139) 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, 1469 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (5088156).

Almost surely, 2^20343539 is an apocalyptic number.

20343539 is a deficient number, since it is larger than the sum of its proper divisors (9085).

20343539 is an equidigital number, since it uses as much as digits as its factorization.

20343539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9084.

The product of its (nonzero) digits is 9720, while the sum is 29.

The square root of 20343539 is about 4510.3812477439. The cubic root of 20343539 is about 272.9871274461.

The spelling of 20343539 in words is "twenty million, three hundred forty-three thousand, five hundred thirty-nine".