20924936 has 8 divisors (see below), whose sum is σ = 39234270. Its totient is φ = 10462464.

The previous prime is 20924903. The next prime is 20924941. The reversal of 20924936 is 63942902.

It can be written as a sum of positive squares in only one way, i.e., 15952036 + 4972900 = 3994^2 + 2230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20924896 and 20924905.

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, 1307801 + ... + 1307816.

Almost surely, 2^20924936 is an apocalyptic number.

It is an amenable number.

20924936 is a deficient number, since it is larger than the sum of its proper divisors (18309334).

20924936 is a wasteful number, since it uses less digits than its factorization.

20924936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615623 (or 2615619 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 20924936 is about 4574.3782091121. The cubic root of 20924936 is about 275.5633015609.

The spelling of 20924936 in words is "twenty million, nine hundred twenty-four thousand, nine hundred thirty-six".