20513324 has 48 divisors (see below), whose sum is σ = 40830720. Its totient is φ = 8951040.

The previous prime is 20513303. The next prime is 20513327. The reversal of 20513324 is 42331502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20513296 and 20513305.

It is not an unprimeable number, because it can be changed into a prime (20513327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91877 + ... + 92099.

It is an arithmetic number, because the mean of its divisors is an integer number (850640).

Almost surely, 2^20513324 is an apocalyptic number.

It is an amenable number.

20513324 is a deficient number, since it is larger than the sum of its proper divisors (20317396).

20513324 is a wasteful number, since it uses less digits than its factorization.

20513324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20513324 is about 4529.1637197169. The cubic root of 20513324 is about 273.7444649048.

Adding to 20513324 its reverse (42331502), we get a palindrome (62844826).

The spelling of 20513324 in words is "twenty million, five hundred thirteen thousand, three hundred twenty-four".