20350638 has 48 divisors (see below), whose sum is σ = 54976896. Its totient is φ = 5285520.

The previous prime is 20350621. The next prime is 20350639. The reversal of 20350638 is 83605302.

20350638 is a `hidden beast` number, since 20 + 3 + 5 + 0 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350639) 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 23 ways as a sum of consecutive naturals, for example, 5956 + ... + 8727.

It is an arithmetic number, because the mean of its divisors is an integer number (1145352).

Almost surely, 2^20350638 is an apocalyptic number.

20350638 is an abundant number, since it is smaller than the sum of its proper divisors (34626258).

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

20350638 is a wasteful number, since it uses less digits than its factorization.

20350638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14709 (or 14706 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20350638 is about 4511.1681414020. The cubic root of 20350638 is about 273.0188772520.

The spelling of 20350638 in words is "twenty million, three hundred fifty thousand, six hundred thirty-eight".