20202399 has 32 divisors (see below), whose sum is σ = 34496000. Its totient is φ = 11446272.

The previous prime is 20202379. The next prime is 20202419. The reversal of 20202399 is 99320202.

It is an interprime number because it is at equal distance from previous prime (20202379) and next prime (20202419).

It is not a de Polignac number, because 20202399 - 2¹⁷ = 20071327 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 (20202379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25887 + ... + 26655.

It is an arithmetic number, because the mean of its divisors is an integer number (1078000).

Almost surely, 2^20202399 is an apocalyptic number.

20202399 is a deficient number, since it is larger than the sum of its proper divisors (14293601).

20202399 is a wasteful number, since it uses less digits than its factorization.

20202399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20202399 is about 4494.7078881725. The cubic root of 20202399 is about 272.3543491199.

The spelling of 20202399 in words is "twenty million, two hundred two thousand, three hundred ninety-nine".