20949224 has 8 divisors (see below), whose sum is σ = 39279810. Its totient is φ = 10474608.

The previous prime is 20949221. The next prime is 20949239. The reversal of 20949224 is 42294902.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 10125124 = 3290^2 + 3182^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20949221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1309319 + ... + 1309334.

Almost surely, 2^20949224 is an apocalyptic number.

It is an amenable number.

20949224 is a deficient number, since it is larger than the sum of its proper divisors (18330586).

20949224 is a wasteful number, since it uses less digits than its factorization.

20949224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618659 (or 2618655 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20949224 is about 4577.0322262357. The cubic root of 20949224 is about 275.6698776513.

The spelling of 20949224 in words is "twenty million, nine hundred forty-nine thousand, two hundred twenty-four".