20938450 has 24 divisors (see below), whose sum is σ = 41942628. Its totient is φ = 7730880.

The previous prime is 20938427. The next prime is 20938459. The reversal of 20938450 is 5483902.

It can be written as a sum of positive squares in 6 ways, for example, as 8946081 + 11992369 = 2991^2 + 3463^2 .

It is not an unprimeable number, because it can be changed into a prime (20938459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15457 + ... + 16756.

Almost surely, 2^20938450 is an apocalyptic number.

20938450 is an abundant number, since it is smaller than the sum of its proper divisors (21004178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20938450 is a wasteful number, since it uses less digits than its factorization.

20938450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32238 (or 32233 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20938450 is about 4575.8551113426. The cubic root of 20938450 is about 275.6226113569.

The spelling of 20938450 in words is "twenty million, nine hundred thirty-eight thousand, four hundred fifty".