20398332 has 24 divisors (see below), whose sum is σ = 49666176. Its totient is φ = 6503728.

The previous prime is 20398331. The next prime is 20398333. The reversal of 20398332 is 23389302.

It is an interprime number because it is at equal distance from previous prime (20398331) and next prime (20398333).

It is a self number, because there is not a number n which added to its sum of digits gives 20398332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20398331) 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 7 ways as a sum of consecutive naturals, for example, 36678 + ... + 37229.

It is an arithmetic number, because the mean of its divisors is an integer number (2069424).

Almost surely, 2^20398332 is an apocalyptic number.

It is an amenable number.

20398332 is an abundant number, since it is smaller than the sum of its proper divisors (29267844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20398332 is a wasteful number, since it uses less digits than its factorization.

20398332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73937 (or 73935 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20398332 is about 4516.4512617762. The cubic root of 20398332 is about 273.2319942923.

The spelling of 20398332 in words is "twenty million, three hundred ninety-eight thousand, three hundred thirty-two".