20398524 has 12 divisors (see below), whose sum is σ = 47596584. Its totient is φ = 6799504.

The previous prime is 20398501. The next prime is 20398529. The reversal of 20398524 is 42589302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20398529) 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 3 ways as a sum of consecutive naturals, for example, 849927 + ... + 849950.

It is an arithmetic number, because the mean of its divisors is an integer number (3966382).

Almost surely, 2^20398524 is an apocalyptic number.

It is an amenable number.

20398524 is an abundant number, since it is smaller than the sum of its proper divisors (27198060).

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

20398524 is a wasteful number, since it uses less digits than its factorization.

20398524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699884 (or 1699882 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20398524 is about 4516.4725173525. The cubic root of 20398524 is about 273.2328515581.

The spelling of 20398524 in words is "twenty million, three hundred ninety-eight thousand, five hundred twenty-four".