20200349 has 4 divisors (see below), whose sum is σ = 21754236. Its totient is φ = 18646464.

The previous prime is 20200343. The next prime is 20200387. The reversal of 20200349 is 94300202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4439449 + 15760900 = 2107^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 20200349 - 2⁸ = 20200093 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 20200349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200343) 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, 776924 + ... + 776949.

It is an arithmetic number, because the mean of its divisors is an integer number (5438559).

Almost surely, 2^20200349 is an apocalyptic number.

It is an amenable number.

20200349 is a deficient number, since it is larger than the sum of its proper divisors (1553887).

20200349 is a wasteful number, since it uses less digits than its factorization.

20200349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553886.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20200349 is about 4494.4798364216. The cubic root of 20200349 is about 272.3451365951.

The spelling of 20200349 in words is "twenty million, two hundred thousand, three hundred forty-nine".