20103782 has 4 divisors (see below), whose sum is σ = 30155676. Its totient is φ = 10051890.

The previous prime is 20103781. The next prime is 20103793. The reversal of 20103782 is 28730102.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103781) by changing a digit.

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, 5025944 + ... + 5025947.

It is an arithmetic number, because the mean of its divisors is an integer number (7538919).

Almost surely, 2^20103782 is an apocalyptic number.

20103782 is a deficient number, since it is larger than the sum of its proper divisors (10051894).

20103782 is a wasteful number, since it uses less digits than its factorization.

20103782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051893.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20103782 is about 4483.7241217541. The cubic root of 20103782 is about 271.9104646914.

Adding to 20103782 its reverse (28730102), we get a palindrome (48833884).

The spelling of 20103782 in words is "twenty million, one hundred three thousand, seven hundred eighty-two".