20402324 has 18 divisors (see below), whose sum is σ = 36495690. Its totient is φ = 9979792.

The previous prime is 20402321. The next prime is 20402351. The reversal of 20402324 is 42320402.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 883600 = 4418^2 + 940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7682 + ... + 9990.

Almost surely, 2^20402324 is an apocalyptic number.

It is an amenable number.

20402324 is a deficient number, since it is larger than the sum of its proper divisors (16093366).

20402324 is a wasteful number, since it uses less digits than its factorization.

20402324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20402324 is about 4516.8931800520. The cubic root of 20402324 is about 273.2498171707.

Adding to 20402324 its reverse (42320402), we get a palindrome (62722726).

The spelling of 20402324 in words is "twenty million, four hundred two thousand, three hundred twenty-four".