20348399 has 8 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 19412536.

The previous prime is 20348359. The next prime is 20348429. The reversal of 20348399 is 99384302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20348399 is a prime.

It is a super-3 number, since 3×20348399³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20348309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10094 + ... + 11940.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^20348399 is an apocalyptic number.

20348399 is a deficient number, since it is larger than the sum of its proper divisors (940561).

20348399 is a wasteful number, since it uses less digits than its factorization.

20348399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20348399 is about 4510.9199726885. The cubic root of 20348399 is about 273.0088642705.

The spelling of 20348399 in words is "twenty million, three hundred forty-eight thousand, three hundred ninety-nine".