20945024 has 16 divisors (see below), whose sum is σ = 41726670. Its totient is φ = 10472448.

The previous prime is 20944981. The next prime is 20945039. The reversal of 20945024 is 42054902.

It can be written as a sum of positive squares in only one way, i.e., 20866624 + 78400 = 4568^2 + 280^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 20944984 and 20945002.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 81689 + ... + 81944.

Almost surely, 2^20945024 is an apocalyptic number.

It is an amenable number.

20945024 is a deficient number, since it is larger than the sum of its proper divisors (20781646).

20945024 is an equidigital number, since it uses as much as digits as its factorization.

20945024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163647 (or 163635 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20945024 is about 4576.5733906494. The cubic root of 20945024 is about 275.6514538843.

Adding to 20945024 its reverse (42054902), we get a palindrome (62999926).

The spelling of 20945024 in words is "twenty million, nine hundred forty-five thousand, twenty-four".