20641324 has 12 divisors (see below), whose sum is σ = 39406248. Its totient is φ = 9382400.

The previous prime is 20641307. The next prime is 20641339. The reversal of 20641324 is 42314602.

It is a happy number.

It is a super-3 number, since 3×20641324³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 20641295 and 20641304.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234517 + ... + 234604.

It is an arithmetic number, because the mean of its divisors is an integer number (3283854).

Almost surely, 2^20641324 is an apocalyptic number.

It is an amenable number.

20641324 is a deficient number, since it is larger than the sum of its proper divisors (18764924).

20641324 is a wasteful number, since it uses less digits than its factorization.

20641324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469136 (or 469134 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20641324 is about 4543.2723889285. The cubic root of 20641324 is about 274.3126592350.

Adding to 20641324 its reverse (42314602), we get a palindrome (62955926).

It can be divided in two parts, 2064132 and 4, that multiplied together give a palindrome (8256528).

The spelling of 20641324 in words is "twenty million, six hundred forty-one thousand, three hundred twenty-four".