20924530 has 24 divisors (see below), whose sum is σ = 41401836. Its totient is φ = 7608480.

The previous prime is 20924521. The next prime is 20924537. The reversal of 20924530 is 3542902.

20924530 = T₁₉₄₅ + T₁₉₄₆ + ... + T₁₉₅₅.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18309841 + 2614689 = 4279^2 + 1617^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20924495 and 20924504.

It is not an unprimeable number, because it can be changed into a prime (20924537) 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 11 ways as a sum of consecutive naturals, for example, 7437 + ... + 9856.

Almost surely, 2^20924530 is an apocalyptic number.

20924530 is a deficient number, since it is larger than the sum of its proper divisors (20477306).

20924530 is a wasteful number, since it uses less digits than its factorization.

20924530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17322 (or 17311 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20924530 is about 4574.3338312808. Note that the first 3 decimals coincide. The cubic root of 20924530 is about 275.5615193265.

The spelling of 20924530 in words is "twenty million, nine hundred twenty-four thousand, five hundred thirty".