20103502 has 4 divisors (see below), whose sum is σ = 30155256. Its totient is φ = 10051750.

The previous prime is 20103493. The next prime is 20103509. The reversal of 20103502 is 20530102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20530102 = 2 ⋅10265051.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103509) 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, 5025874 + ... + 5025877.

It is an arithmetic number, because the mean of its divisors is an integer number (7538814).

Almost surely, 2^20103502 is an apocalyptic number.

20103502 is a deficient number, since it is larger than the sum of its proper divisors (10051754).

20103502 is a wasteful number, since it uses less digits than its factorization.

20103502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051753.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20103502 is about 4483.6928976013. The cubic root of 20103502 is about 271.9092023206.

Adding to 20103502 its reverse (20530102), we get a palindrome (40633604).

The spelling of 20103502 in words is "twenty million, one hundred three thousand, five hundred two".