20238349 has 4 divisors (see below), whose sum is σ = 20278620. Its totient is φ = 20198080.

The previous prime is 20238329. The next prime is 20238353. The reversal of 20238349 is 94383202.

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 8555625 + 11682724 = 2925^2 + 3418^2 .

It is a cyclic number.

It is not a de Polignac number, because 20238349 - 2¹⁹ = 19714061 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 20238349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238329) 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, 19372 + ... + 20389.

It is an arithmetic number, because the mean of its divisors is an integer number (5069655).

Almost surely, 2^20238349 is an apocalyptic number.

It is an amenable number.

20238349 is a deficient number, since it is larger than the sum of its proper divisors (40271).

20238349 is an equidigital number, since it uses as much as digits as its factorization.

20238349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40270.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20238349 is about 4498.7052581826. The cubic root of 20238349 is about 272.5158041503.

The spelling of 20238349 in words is "twenty million, two hundred thirty-eight thousand, three hundred forty-nine".