20340359 has 4 divisors (see below), whose sum is σ = 21905016. Its totient is φ = 18775704.

The previous prime is 20340323. The next prime is 20340373. The reversal of 20340359 is 95304302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20340359 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 (20340319) 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, 782309 + ... + 782334.

It is an arithmetic number, because the mean of its divisors is an integer number (5476254).

Almost surely, 2^20340359 is an apocalyptic number.

20340359 is a deficient number, since it is larger than the sum of its proper divisors (1564657).

20340359 is a wasteful number, since it uses less digits than its factorization.

20340359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564656.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 20340359 is about 4510.0287138776. The cubic root of 20340359 is about 272.9729027120.

The spelling of 20340359 in words is "twenty million, three hundred forty thousand, three hundred fifty-nine".