20310399 has 16 divisors (see below), whose sum is σ = 30207840. Its totient is φ = 13487040.

The previous prime is 20310397. The next prime is 20310401. The reversal of 20310399 is 99301302.

It is an interprime number because it is at equal distance from previous prime (20310397) and next prime (20310401).

It is not a de Polignac number, because 20310399 - 2¹ = 20310397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6249 + ... + 8925.

It is an arithmetic number, because the mean of its divisors is an integer number (1887990).

Almost surely, 2^20310399 is an apocalyptic number.

20310399 is a deficient number, since it is larger than the sum of its proper divisors (9897441).

20310399 is a wasteful number, since it uses less digits than its factorization.

20310399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967 (or 2961 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 20310399 is about 4506.7060032800. The cubic root of 20310399 is about 272.8388131940.

The spelling of 20310399 in words is "twenty million, three hundred ten thousand, three hundred ninety-nine".